The Higgs Mechanism Explained | Space Time | PBS Digital Studios

Фрагмент с начала видео - The Higgs Mechanism Explained | Space Time | PBS Digital Studios

Фрагмент с средины видео - The Higgs Mechanism Explained | Space Time | PBS Digital Studios

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What is the Higgs field and why is it a fundamental part of our universe? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Quantum Field Theory is generally accepted as an accurate description of the subatomic universe. However until recently this theory had one giant hole in it. The particles it describes had no mass! The Higgs field and the Higgs mechanism were proposed long ago in order to give particles mass, but it was only in 2012 that the existence of the field was proved with the discovery of the Higgs boson by the Large Hadron Collider. In this episode of Space Time, we tell you exactly how the Higgs field can give something mass, which opens the door to a deeper understanding of what mass really is. ______________________ Comments: AFastidiousCuber Casteverus Gareth Dean WR3ND ______________________ Further Reading and Watching: Leonard Susskind on the Higgs interaction: Gravitational waves heating up a star: McKernan et al. 2014



How Do You Measure the Size of the Universe? | Space Time | PBS Digital Studios

Фрагмент с начала видео - How Do You Measure the Size of the Universe? | Space Time | PBS Digital Studios

Фрагмент с средины видео - How Do You Measure the Size of the Universe? | Space Time | PBS Digital Studios

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Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Support us on Patreon! Help translate our videos! The universe is HUGE. But, there is only so much of the universe we can ACTUALLY see, and if we wanted to measure that FINITE space, how would we do it? A gigantic ruler? One really long car ride? Or maybe it's something even more spectacular, something that involves not only the observable universe as it is NOW, but how it was when it was first BORN? Join Gabe in this week's SpaceTime as he embarks on the quest to MEASURE THE SIZE OF THE UNIVERSE. Extra Credit: Much of this episode was based on this Nobel Prize winning paper. ----------------------------------------­------------------------------- Comments: PantsuMann Nik G vegetaafh Rob LaRosa ----------------------------------------­------------------------------- New SpaceTime episodes every Wednesday! Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Hosted by Gabe Perez-Giz Made by Kornhaber Brown ()



Are You a Boltzmann Brain? | Space Time

Фрагмент с начала видео - Are You a Boltzmann Brain? | Space Time

Фрагмент с средины видео - Are You a Boltzmann Brain? | Space Time

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Was an incredible drop in entropy responsible for the Big Bang? If that’s the case, this would lead us to conclude that a great many other things are possible, including the likelihood that you are a Boltzmann Brain. Try The Great Courses Plus at You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: The Oh My God Particle The second Law of Thermodynamics tells us that everything moves towards a state of greater entropy, but it is low entropy that enables galaxies, stars, planets and human beings. The lowest entropy state that we’re aware of in our universe was right before the Big Bang. The entirety of our own universe was condensed to a microscopic size. What caused this extreme low entropy? If it was caused by a random fluctuation in particles that implies that a great many other things are possible due to the random fluctuations of particles. One of the strangest of those possibilities is that of the Boltzmann Brain. If the Big Bang was caused by random entropic fluctuations then it is much more likely you are a Boltzmann Brain than that you are a human being. Written and Hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Kurt Ross Made by Kornhaber Brown () The Great Courses Plus is currently available to watch through a web browser to almost anyone in the world and optimized for the US market. The Great Courses Plus is currently working to both optimize the product globally and accept credit card payments globally. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Shane Robinson David Nicklas Samuel Dean Jacintho Quasar Tambe Barsbay Luna IT Solutions Coolascats Avan & Kyan Griggs Max Levine Hypernova Science Via Markets Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Justin Lloyd Conor Dillon Jared Moore Michal-Peanut Karmi Bernardo Higuera Erik Stein Daniel Lyons Jade Bilkey Kevin Warne JJ Bagnell J Rejc Dylan Merida Amy Jie Anthony Caridi Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss Eric Jackson



When Time Breaks Down | Space Time | PBS Digital Studios

Фрагмент с начала видео - When Time Breaks Down | Space Time | PBS Digital Studios

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This episode on the physics of time syncs perfectly with Pink Floyd's 'Dark Side of the Moon.' Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Last week we learned how motion gives matter its mass. But how does motion affect time? Let’s dive deeper into the true nature of matter and mass by exploring Einstein’s photon clock thought experiment, and the phenomenon that is time dilation. Last Week's Episode: The True Nature of Matter and Mass The Speed of Light is NOT About Light ______________________ Original thumbnail art by Charles Ballard ______________________ COMMENTS: Paramdeep Singh obheroi Bernardo SOUSA Joshua Hillerup ______________________ Written and hosted by Matt O’Dowd Made by Kornhaber Brown ()



The Unruh Effect | Space Time

Фрагмент с начала видео - The Unruh Effect | Space Time

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Worried about black holes? Consider this: Every time you accelerate - you generate an event horizon behind you. The more you accelerate away from it the closer it gets. Don’t worry, it can never catch up to you, but the Unruh radiation it generates sure can. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: The Andromeda-Milky Way Collision Around the same time that Stephen Hawking was demonstrating the existence of the black hole radiation that would bear his name, three other researchers, Stephen Fulling, Paul Davis, and William Unruh, were looking at an effect that now seems eerily similar. They were independently studying how the nature of quantum fields appears to change depending on whether or not an observer is accelerating. They found that simple act of acceleration cuts off your causal access to a region of the universe. It creates a type of event horizon. As we saw in our episode on horizon radiation, the presence of horizons distorts the quantum vacuum in a way that can create particles. Hosted by Matt O'Dowd Written by Graeme Gossel and Matt O'Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown () Classical analogue of the Unruh effect Leonhardt, Griniasty, Wildeman, Fort, & Fink Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Faisal Saud Anton Lifshits Joey Redner Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Hypernova Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Jordan Young Ratfeast John Hofmann Craig Peterson Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen TJMadison Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell J Rejc Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss



Is The Alcubierre Warp Drive Possible? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Is The Alcubierre Warp Drive Possible? | Space Time | PBS Digital Studios

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Фрагмент с конца видео - Is The Alcubierre Warp Drive Possible? | Space Time | PBS Digital Studios

Is mankind capable of achieving warp speed? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Inspired by Gene Roddenberry’s Star Trek, physicist Miguel Alcubierre set out to transform one of the cornerstones of science fiction iconography, the Warp Drive, into reality. But is it even possible? Can we warp the fabric of reality so that we can break the speed of light? And why is NASA actually exploring this potentiality? Join Matt on this week’s episode to learn the physics of what's physically possible! “What Happens At The Edge of the Universe”: ----------------------------------------­­--------- COMMENTS: Renato Grigoli (Chopin) psantochi MrSh1pman Tenebrae Un Disclosed Simon Martin ----------------------------------------­­--------- REFERENCES: Alcubierre 1994 Krasnikov 1995 Van Den Broeck 1999 Krasnikov 2002 Harold White, Warp Field Mechanics 101 Harold White, Warp Field Mechanics 102 ----------------------------------------­­--------- Let us know what topics you want to learn more about:



Is It Irrational to Believe in Aliens? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Is It Irrational to Believe in Aliens? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Is It Irrational to Believe in Aliens? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Is It Irrational to Believe in Aliens? | Space Time | PBS Digital Studios

Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Support us on Patreon! Help translate our videos! Aliens! Could humans really be alone in this expansive universe? And if we're not, how come we've never made contact with other intelligent life? Everyone's thought about it; especially members of the scientific community. Join Gabe as he presents some of the most popular theories that scientists use to rationalize their support or skepticism of the existence of aliens. We may never know the answer to this age old question, but a little scientific thinking never hurt anybody! Extra Credit: ----------------------------------------­------------------------------- Comments: D. Moritz Gaëtan DO VAN LANH via Google+ The Gentleman Physicist Nicholas Feeley James Morgan ----------------------------------------­------------------------------- New SpaceTime episodes every Wednesday! Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Hosted by Gabe Perez-Giz Made by Kornhaber Brown ()



Is There a Fifth Fundamental Force? + Quantum Eraser Answer | Space Time | PBS Digital Studios

Фрагмент с начала видео - Is There a Fifth Fundamental Force? + Quantum Eraser Answer | Space Time | PBS Digital Studios

Фрагмент с средины видео - Is There a Fifth Fundamental Force? + Quantum Eraser Answer | Space Time | PBS Digital Studios

Фрагмент с конца видео - Is There a Fifth Fundamental Force? + Quantum Eraser Answer | Space Time | PBS Digital Studios

Has a fifth fundamental force been discovered and how will this effect our understanding of the universe? Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Quantum Eraser Challenge Previous Episode New Fundamental Particle Discovered A laboratory in Hungary has has witnessed a startlingly strange reaction between Beryllium-8 atoms. It seems to point to the existence of a fundamental force beyond the four we already know. And this new force may have something to do with dark matter. Nature Article on Radioactive Decay Anomaly The associated Feng et al. 2016 paper: Krasznahorkay et al. 2015 first report the anomaly Written and hosted by Matt O’Dowd Made by Kornhaber Brown () Challenge Winners: Dana D Michael Eby Benjamin Midtvedt Annabelle Strong Mohamad Zeina Gabriel Bean



Black Hole Swarms | Space Time

Фрагмент с начала видео - Black Hole Swarms | Space Time

Фрагмент с средины видео - Black Hole Swarms | Space Time

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: It’s been conjectured that the center of the Milky Way is swarming with tens of thousands of black holes. And now we’ve actually seen them. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: Using Stars to See Gravitational Waves This episode of Space Time Journal Club looks at the paper: A density cusp of quiescent X-ray binaries in the central parsec of the Galaxy by Hailey, Mori, Bauer, Berkowitz, Hong & Hord (2018) The core of our galaxy is a wild place. The stars are so densely packed that the night sky would be 500 times brighter. A supermassive black hole, 4 million times the mass of our Sun lurks in the center. It flings nearby stars into extreme slingshot orbits. It consumes anything that gets too close is consumed, burping a blast of X-rays. We know these things because we see them from our comfortable vantage point 28,000 light years out in the galactic disk. But there’s one particularly terrible feature of the core of our galaxy that, until now, has only been has only be hypothesized: The central few light years of the Milky Way is thought to contain a vast swarm of smaller black holes that have rained in from the surrounding galaxy. Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Anton Lifshits Joey Redner Fabrice Eap Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Hypernova Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Jordan Young Ratfeast John Hofmann Craig Peterson Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Shannan Catalano Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen TJMadison Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell J Rejc Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss Brandon Cook Daniel Lyons



The Misunderstood Nature of Entropy

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Entropy and the second law of thermodynamics has been credited with defining the arrow of time. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: Quantum Invariance & The Origin of The Standard Model Entropy is surely one of the most intriguing and misunderstood concepts in all of physics. The entropy of the universe must always increase – so says the second law of thermodynamics. It’s a law that seems emergent from deeper laws – it’s statistical in nature – and yet may ultimately be more fundamental and unavoidable than any other law of physics. Hosted by Matt O'Dowd Written Matt O'Dowd Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Anton Lifshits Joey Redner Fabrice Eap Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Vinnie Falco Hypernova Donal Botkin Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray سلطان الخليفي Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss Shannan Catalano Brandon Cook Malte Ubl



Strange Stars | Space Time | PBS Digital Studios

Фрагмент с начала видео - Strange Stars | Space Time | PBS Digital Studios

Фрагмент с средины видео - Strange Stars | Space Time | PBS Digital Studios

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What happens when matter can’t get any denser yet somehow does? The answer - it becomes “strange.” Strange Stars may be the most massive stellar remnant that is just shy of forming a black hole. And they could be even cooler than black holes. Space Time is now on Patreon! If you’d like to support the show you can go to and throw us a few bucks. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Neutron stars are made of a substance known as Neutronium. It was thought that this was the densest form of matter possible but some theoretical physicists believe that at the core of some neutron stars the Neutronium breaks down even further, into quark matter. It may even evolve one step further into “strange matter , the densest and most stable substance in the universe. Previous Space Time episode: How to Build a Black Hole Written and hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Made by Kornhaber Brown () Comments answered by Matt: Pixel Girl FatFingerJack Neil Upfalow Loren Supernaw Tabularasa0606 One Man Wolf Pack Pipe2DevNull



Quantum Entanglement and the Great Bohr-Einstein Debate | Space Time | PBS Digital Studios

Фрагмент с начала видео - Quantum Entanglement and the Great Bohr-Einstein Debate | Space Time | PBS Digital Studios

Фрагмент с средины видео - Quantum Entanglement and the Great Bohr-Einstein Debate | Space Time | PBS Digital Studios

Фрагмент с конца видео - Quantum Entanglement and the Great Bohr-Einstein Debate | Space Time | PBS Digital Studios

For those of you in New York City you can check out Matt live at PBS Nerd Night at the NYC YouTube Space on Thursday night September 22nd. Hope to see you there. to.pbs.org/nerdnight Albert Einstein strongly disagreed with Niels Bohr when it came to Bohr’s interpretation of quantum mechanics. Quantum entanglement settled the argument once and for all. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Previous Episode - Self-Replicating Robots and Galactic Domination Veritasium’s video Quantum Entanglement and Spooky Action at a Distance at 7:36 How the Quantum Eraser Rewrites the Past at 8:41 Einstein argued that elementary particles maintained their intrinsic values whether they were being observed or not. Bohr believed that in observing such particles we collapsed a wave function of probabilities. He asserted that it is only when these wave functions collapse that one of many probabilities is chosen and the particles take on distinct values. Quantum entanglement, John Stewart Bell and Alain Aspect eventually proved that Bohr was correct. Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown () Comments: Borne Stellar Strofi Kornego Daniel Oberley



Does Dark Matter BREAK Physics? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Does Dark Matter BREAK Physics? | Space Time | PBS Digital Studios

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Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! SPACETIME IS BACK! And with this episode we welcome in Matt O’Dowd as the new host to rigorously take you through the mysteries of space, time, and the nature of reality. We’re starting off this new season with perhaps one of the most mysterious things of all — DARK MATTER. What is it? Where does it come from? And is it even real? Watch this episode of Space Time to find out! ----------------------------------------­--------- Comment Links SafetySkull Agen0000 ----------------------------------------­--------- Let us know what topics you want to learn more about:



Is Quantum Tunneling Faster than Light? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Is Quantum Tunneling Faster than Light? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Is Quantum Tunneling Faster than Light? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Is Quantum Tunneling Faster than Light? | Space Time | PBS Digital Studios

Start your Audible trial today: Hello from the other side. In this episode find out how quanta can can move through solid objects. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Where are you right now? Until you interact with another particle you could be any number of places within a wave of probabilities. This is only one way that quantum mechanics challenges our perception of reality. Matt dives into these counter-intuitive ideas and explains the bizarre phenomenon known as quantum tunneling in this episode of Space Time. Written and hosted by Matt O’Dowd Made by Kornhaber Brown () *Paper referenced in episode is Measurement of the Single-Photon Tunneling Time by Steinberg, Kwiat, & Chiao, 1993, Phys. Rev. Lett. 71, 708 and can be found here: Check out the previous episode of Space Time: Is an Ice Age Coming?



Cosmic Microwave Background Explained | Space Time | PBS Digital Studios

Фрагмент с начала видео - Cosmic Microwave Background Explained | Space Time | PBS Digital Studios

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Фрагмент с конца видео - Cosmic Microwave Background Explained | Space Time | PBS Digital Studios

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Support us on Patreon! Help translate our videos! HAS SPACE ALWAYS BEEN BLACK? As long as we've been around, YES. But the universe gets much more exciting, AND much BRIGHTER, as we start winding our clocks back to the early days of the universe. Near the beginning of the universe, when space was rapidly expanding, that dark night sky we know so well as actually…ORANGE! But why? Did the lights just go out, or did something more spectacular happen? Watch this episode of PBS Space Time and find out! Extra Credit: CMG Scissored Pair ----------------------------------------­­­------------------------------- New SpaceTime episodes every Wednesday! Hosted by Gabe Perez-Giz Made by Kornhaber Brown ()



The True Nature of Matter and Mass | Space Time | PBS Digital Studios

Фрагмент с начала видео - The True Nature of Matter and Mass | Space Time | PBS Digital Studios

Фрагмент с средины видео - The True Nature of Matter and Mass | Space Time | PBS Digital Studios

Фрагмент с конца видео - The True Nature of Matter and Mass | Space Time | PBS Digital Studios

Are matter, mass, and time real? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! We know that mass is energy… but what is energy? And where did matter and time even come from? Matt begins to dive into these intricate topics by first examining what inertial mass is, how it relates to gravitational mass, and what it all means for mass as a fundamental property. The Speed of Light is NOT About Light The Real Meaning of E=mc² ______________________ COMMENTS: Caleb Limb Felix Feist deathbypowerpoint ______________________ FURTHER READING: Inertial Mass Equivalence Principle ______________________ Written and hosted by Matt O’Dowd Made by Kornhaber Brown ()



Hawking Radiation

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: It’s the most famous prediction of perhaps the most famous genius of our time. Stephen Hawking's theory of Hawking Radiation. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Quantum Vacuum Playlist Previous Episode: Should Space be Privatized? Soon after Einstein revealed his great general theory of relativity in 1915, physicists realized that it allowed for the possibility of catastrophic gravitational collapse. In places of extreme density like the dead core of a massive star, space and time could be dragged inwards to create a hole in the universe: a boundary in spacetime called an event horizon that could be entered, but from beyond which nothing could return. Once formed, there was nothing in theory or imagination that could bring material consumed back to the outside universe. These black holes should exist forever – only growing, never shrinking. References: Black Hole Explosions? S. W. Hawking (1974) (paywall) Particle Breation by Black Holes S. W. Hawking (1975) (paywall) Hawking Radiation as Tunneling M. K. Parikh & F. Wilczek (2002) Hosted by Matt O'Dowd Written by Matt O'Dowd and Graeme Gossel Produced by Rusty Ward Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Faisal Saud Anton Lifshits Joey Redner Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Hypernova Matthew O’Connor Eugene Lawson Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Barry Hatfield Edmund Fokschaner Kevin Costello Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen TJMadision Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Daniel Lyons Kevin Warne JJ Bagnell J Rejc Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss



Quantum Eraser Lottery Challenge | Space Time | PBS Digital Studios

Фрагмент с начала видео - Quantum Eraser Lottery Challenge | Space Time | PBS Digital Studios

Фрагмент с средины видео - Quantum Eraser Lottery Challenge | Space Time | PBS Digital Studios

Фрагмент с конца видео - Quantum Eraser Lottery Challenge | Space Time | PBS Digital Studios

Matt challenges you to use quantum physics to win the lottery. Are you up to the task? Previous Episode on Quantum Eraser Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! The Quantum Eraser experiment seems to show that information can travel backwards in time. On today’s episode of Space Time, we are going to create a time-traveling communication device and use it to cheat on the lottery! Here's Your Challenge question: Why am I going to be sadly disappointed after turning on my invention? I do get a signal – nice work future me – and that signal DOES contain the interference patterns from my future choices with perfect fidelity. But for some reason I can’t read the numbers. What went wrong? Written and hosted by Matt O’Dowd Made by Kornhaber Brown () Challenge Answers Submit your answers with full work to pbsspacetime@gmail.com for a chance to win a Space Time t-shirt. Make sure you use the subject title “Quantum Eraser Challenge question” to be in the running. Submit answers before August 24, 2016.



Have Gravitational Waves Been Discovered?!? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Have Gravitational Waves Been Discovered?!? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Have Gravitational Waves Been Discovered?!? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Have Gravitational Waves Been Discovered?!? | Space Time | PBS Digital Studios

Has the last great prediction of Einstein's general relativity finally been verified? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! For the past 90 years, the predictions laid out Einstein's general theory of relativity have continued to be confirmed by experimental science. The last hold out is gravitational waves - the idea that certain gravitational events cause actual ripples in Spacetime. The problem is that the effects are almost beyond microscopic, so they are incredibly hard to detect. But have scientist done it? Have gravitational waves finally been directly observed??? Watch the episode to find out. Gravitational Waves Extra Credit: Nature article on rumor: Lawrence Krauss' tweet: Comments: Eshan Das NOBUNAGA1991 aaroNiGHTS Tim Pipp Marse Petrarse Procyon Beta dentoncrimescene



Can You Trust Your Eyes in Spacetime? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Can You Trust Your Eyes in Spacetime? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Can You Trust Your Eyes in Spacetime? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Can You Trust Your Eyes in Spacetime? | Space Time | PBS Digital Studios

What can you trust in Spacetime? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Last time we talked about what curvature means, looked at geodesics, great circles on spheres, and tried to understand the notion of straightness. This week on Spacetime, we take a detour into how geometry works in spacetime. Get excited, because this episode is even more mind-bending than the last! Past Episodes On SpaceTime: Are Space And Time An Illusion? : Is Gravity An Illusion? Can A Circle Be A Straight Line? Let us know what topics you want to learn more about: Extra Credit: Overview of Special Relativity and spacetime: Brian Greene's introduction to special relativity (thanks to viewer Mark G for pointing out these courses!) (no math) (more math) Disagreement about event sequence (relativity of simultaneity): More_about_the_relativity_of_simultaneity ----------------------------------------­­­­­­­­­­­­­­­--------------------------­-­-­-­-­- Music: u dont know im fadin Secret Society - Logical Disorder () Movement 3 - Janne Hanhisuanto () Philly D Jr - Patternbased () Earth Breath - Human Terminal (.) Deep Blue - Janne Hanhisuanto () Saw Slicing - Patternbased () Heisse Luft - Thompson and Kuhl () miracle - slow () Tropico de Tauro - Sr. Aye ) New SpaceTime episodes every Wednesday! Hosted by Gabe Perez-Giz Made by Kornhaber Brown ()



Self-Replicating Robots and Galactic Domination | Space Time | PBS Digital Studios

Фрагмент с начала видео - Self-Replicating Robots and Galactic Domination | Space Time | PBS Digital Studios

Фрагмент с средины видео - Self-Replicating Robots and Galactic Domination | Space Time | PBS Digital Studios

Фрагмент с конца видео - Self-Replicating Robots and Galactic Domination | Space Time | PBS Digital Studios

To check out any of the lectures available from Great Courses Plus go to We’ll soon be capable of building self-replicating robots. This will not only change humanity’s future but reshape the galaxy as we know it. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Previous Episode - Is there a 5th Fundamental Force Should we Build a Dyson Sphere? Self-assembling robots are referred to as von Neumann machines after the man responsible for originally proposing them, John von Neumann. Since then, the potential of these machines and their ability to proliferate throughout known space has made galactic colonization seem not only possible but perhaps inevitable. Written and hosted by Matt O’Dowd Made by Kornhaber Brown () References: von Neumann, John The Theory of Self-reproducing Automata, Urbana, IL: Univ. of Illinois Press. ed. A. Burks, 1966 Robert A. Freitas Jr., Ralph C. Merkle, Kinematic Self-Replicating Machines, Landes Bioscience, Georgetown, TX, 2004; Robo3D R1 printing an upgrade for itself



Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

Фрагмент с начала видео - Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

Фрагмент с средины видео - Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

Фрагмент с конца видео - Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

There’s one interpretation of the meaning of quantum mechanics that manages to skip a lot of the unphysical weirdness of the mainstream interpretations: it's de Broglie-Bohm pilot wave theory. Help us continue making this show by contributing here: Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help tranlate our videos! There are some pretty out-there explanations for the processes at work behind the incredibly successful mathematics of quantum mechanics - things are both waves and particles at the same time, the act of observation defines reality, cats are alive and dead, or even: the universe is constantly splitting into infinite alternate realities. The weird results of quantum experiments seem to demand weird explanations of the nature of reality. In this episode, Matt discusses de Broglie-Bohm pilot wave theory, the one interpretation of quantum mechanics that remains comfortably, stodgily physical. Links to Sources The Quantum Experiment that Broke Reality The Many Worlds of the Quantum Multiverse Is This What Quantum Mechanics Looks Like? A Suggested Interpretation of the Quantum Theory in Terms of Hidden Variables. I: David Bohm, 1952, Phys. Rev. 85, 166 Bohms original paper is behind the journal paywall (sorry!), however many other readings on Bohmian mechanics are available here: Previous Space Time Episode Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown () Comments Answered by Matt Burak Bağdatlı Sebastián López The757packerfan Special thanks to our Patreon Hypernova and Quasar Supporters: Joel Brinton Antonio Park Alastair Taft Clock Watcher Joe John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Jade Bilkey Kevin Warne JJ Bagnell J Rejc Bernardo Higuera Michael Fischer Dylan Merida Colette Weeks Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss David Matteson Marc Lagarde Eric Jackson Will and Sonja Marple



Black Holes from the Dawn of Time

Фрагмент с начала видео - Black Holes from the Dawn of Time

Фрагмент с средины видео - Black Holes from the Dawn of Time

Фрагмент с конца видео - Black Holes from the Dawn of Time

Primordial black holes may be lurking throughout our universe. How large are they, how many are out there and what would happen if they moved through our solar system? To learn more about black holes, gravity and so much more check out The Great Courses Plus by going to Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Scientists believe that many black holes may have been created at the time of the Big Bang and and are still roaming our universe today. If we found them they would tell us a great deal about the origins of the cosmos. Previous Episode How to Build a Black Hole Do Events Inside Black Holes Happen? Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown () Comments answered by Matt: Parameth Ratnasakha Turcan Fred Leonidas Pereira ZombieWelder Goodsire Arduenn Schwartzman



The Fate of the First Stars | Space Time

Фрагмент с начала видео - The Fate of the First Stars | Space Time

Фрагмент с средины видео - The Fate of the First Stars | Space Time

Фрагмент с конца видео - The Fate of the First Stars | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Population III stars were the very first stars in our universe and far larger than any we can see today. Where are they now? Start your Audible trial today at You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: Martian Evolution Soon after the Big Bang, the first generation of monstrously large stars ignited, lit up the universe, and then died. The resulting swarms of supernova explosions enriched the universe with the first heavy elements and LOTs of black holes. They shaped everything that came after. These were the stars of Population III, and they are one of the most enduring mysteries in astrophysics. Hosted by Matt O’Dowd Written by Matt O'Dowd and Alexandra Yep Produced by Rusty Ward Graphics by Kurt Ross Made by Kornhaber Brown () Comments answer by Matt: Better & Better Matt b Peregrin O’Connor Saleem Says David Webster Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Shane Robinson David Nicklas Samuel Dean Jacintho Eugene Lawson Quasar Tambe Barsbay Coolascats Avan & Kyan Griggs Max Levine Hypernova Science Via Markets Chuck Zegar Jordan Young Ratfeast John Hofmann Joseph Salomone Thanks to our Patreon Gamma Ray Burst Supporters: Justin Lloyd Conor Dillon Jared Moore Michal-Peanut Karmi Bernardo Higuera Erik Stein Daniel Lyons Jade Bilkey Kevin Warne JJ Bagnell J Rejc Amy Jie Dylan Merida Anthony Caridi Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss Eric Jackson



What Caused the Big Bang?

Фрагмент с начала видео - What Caused the Big Bang?

Фрагмент с средины видео - What Caused the Big Bang?

Фрагмент с конца видео - What Caused the Big Bang?

Check out the new Space Time Merch Store! Support Space Time on Patreon Every astronomy textbook tells us that soon after the Big Bang, there was a period of exponentially accelerating expansion called cosmic inflation. In a tiny fraction of a second, inflationary expansion multiplied the size of the universe by a larger factor than in the following 13 and a half billion years of regular expansion. This story seems like a bit of a … stretch. Is there really any mechanism that could cause something like this to happen? What what we’re covering today – the real physics of cosmic inflation. Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer Directed by Andrew Kornhaber Produced By: Kornhaber Brown Dark Energy Playlist: The Quantum Vacuum and Hawking Radiation Playlist Most cosmologists buy some variation of the inflation hypothesis. It seems to very neatly solve some of the biggest questions in cosmology. Those being: why is matter and energy so smoothly spread out across the entire observable universe? And why is the geometry of the universe so flat? Neither should be expected unless the universe expanded much more rapidly early on. We explored these problems in an earlier video – worth a look if you really want to get inflation. Another problem fixed by inflation is the absence of magnetic monopoles – strange particles predicted to have been produced in the early universe. We’ll come back to those another time. Big Bang Supporters: Anton Lifshits David Nicklas Fabrice Eap Juan Benet Justin Lloyd Morgan Hough Quasar Supporters: Mark Heising Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova Supporters: Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John R. Slavik Jordan Young Joseph Salomone kkm Mark Heising Matthew Matthew O'Connor Syed Ansar Gamma Ray Burst Supporters: Adrien Hatch Alexey Eromenko Andreas Nautsch Bradley Jenkins Brandon Labonte Carlo Mogavero Daniel Lyons David Behtala DFaulk Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Jonathan Nesfeder Joseph Dillman Joseph Emison Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nick Virtue Paul Rose Ryan Jones Scott Gossett Sigurd Ruud Frivik Tim Jones Tim Stephani Tommy Mogensen Yurii Konovaliuk سلطان الخليفي



Are Space and Time An Illusion? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Are Space and Time An Illusion? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Are Space and Time An Illusion? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Are Space and Time An Illusion? | Space Time | PBS Digital Studios

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Support us on Patreon! Help translate our videos! SPACE, TIME, AND THE NATURE OF REALITY. This episode of Space Time is actually about Spacetime, so pull up a chair, grab your favorite snack, and buckle up, because this episode is going to be a TRIP. Gabe explores what reality is, what time is, and why what you think those things are is probably WRONG. Seriously, get ready to have your MIND BLOWN! Extra Credit: Overview of Special Relativity and spacetime: Disagreement about event sequence (relativity of simultaneity): More_about_the_relativity_of_simultaneity ----------------------------------------­­­­­­­------------------------------- Comments: Daniel Jenkins Nicholas Garrison Jo G.P. Dikasad2 Joey Broda McKnowledge1000 DHGameStudios At-Bristol Science Centre bjs301 Music: Movement 3 - Janne Hanhisuanto () Heisse Luft - Thompson and Kuhl (.) Deep Blue - Janne Hanhisuanto () Nervewrecking - Patternbased () miracle - slow () Secret Society - Logical Disorder () 165mm Length Ghost - Sabi () While She Sleeps (Morning Edit) - The Lights Galaxia () Tropico de Tauro - Sr. Aye () New SpaceTime episodes every Wednesday! Hosted by Gabe Perez-Giz Made by Kornhaber Brown ()



Quantum Invariance & The Origin of The Standard Model

Фрагмент с начала видео - Quantum Invariance & The Origin of The Standard Model

Фрагмент с средины видео - Quantum Invariance & The Origin of The Standard Model

Фрагмент с конца видео - Quantum Invariance & The Origin of The Standard Model

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: In simple terms a gauge theory is one that has mathematical parameters, or “degrees of freedom” that can be changed without affecting the predictions of the theory. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: Will A New Neutrino Change The Standard Model? As far as we can tell, mathematics is the language in which the universe is written. Our laws of physics are equations of motion, along with some associated constants. Previously we’ve talked a bit about the symmetries of these equations, and how they lead us to conserved quantities. But this is just the tip of the theoretical iceberg - sometimes investigating the symmetries of these equations predicts entirely new physics. The most remarkable example of this is the standard model of particle physics. You know, the most accurate physical theory in all of human history. Hosted by Matt O'Dowd Written by Graeme Gossel and Matt O'Dowd Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Anton Lifshits Joey Redner Fabrice Eap Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Vinnie Falco Hypernova Donal Botkin Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray سلطان الخليفي Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss Shannan Catalano Brandon Cook Malte Ubl



How the Quantum Eraser Rewrites the Past | Space Time | PBS Digital Studios

Фрагмент с начала видео - How the Quantum Eraser Rewrites the Past | Space Time | PBS Digital Studios

Фрагмент с средины видео - How the Quantum Eraser Rewrites the Past | Space Time | PBS Digital Studios

Фрагмент с конца видео - How the Quantum Eraser Rewrites the Past | Space Time | PBS Digital Studios

Try Audible: Causality is meant to move in one direction: forward. But the Quantum Eraser experiment seems to reverse causality. How and why can this happen and what are the implications of this experiment on how we understand Quantum Mechanics and our greater universe? Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! A Delayed Choice Quantum Eraser Kim, Yu, Kulik, Shih & Scully, 2000, Physical Review Letters v.84 p.1 Previous Episode on Can We Survive the Destruction of the Earth? ft. Neal Stephenson Previous Episode on The Quantum Experiment that Broke Reality Gamma Ray Bursts by In a Nutshell Episode written and hosted by Matt O’Dowd Made by Kornhaber Brown () Comments answered by Matt MirceaKitsune tsjoencinema Weapon Valhalla Narigone TimmacTR kaleb tandberg The deathless face of the unborn mind Error 404: Hodor Not Found



Escape The Kugelblitz Challenge | Space Time | PBS Digital Studios

Фрагмент с начала видео - Escape The Kugelblitz Challenge | Space Time | PBS Digital Studios

Фрагмент с средины видео - Escape The Kugelblitz Challenge | Space Time | PBS Digital Studios

Фрагмент с конца видео - Escape The Kugelblitz Challenge | Space Time | PBS Digital Studios

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: If you know enough about astrophysics you could save the world from alien attack. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! In the last episode Matt discussed how the Penrose Diagram enabled you to map how black holes affect Space Time. In this episode you can use that knowledge to stop an all-too-real threat to our planet. Aliens are trying to destroy the Earth by creating a Kugelblitz under our feet. Will you use a Dyson Sphere to stop them or a satellite based deflector array? Choose wisely and save humanity. Choose poorly and … well, let’s just hope you choose wisely. Last Episode - What Happens at the Event Horizon? Written and hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Hypernova and Quasar Supporters: Henry Van Styn Antonio Park Joel Brinton Luna IT Solutions Clock Watcher Joe Ratfeast Vitaly Kovalenko John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Jade Bilkey Kevin Warne JJ Bagnell J Rejc Bernardo Higuera Michael Fischer Dylan Merida Colette Weeks Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss David Matteson Marc Lagarde Eric Jackson Will and Sonja Marple



Are We Alone? Galactic Civilization Challenge | Space Time | PBS Digital Studios

Фрагмент с начала видео - Are We Alone? Galactic Civilization Challenge | Space Time | PBS Digital Studios

Фрагмент с средины видео - Are We Alone? Galactic Civilization Challenge | Space Time | PBS Digital Studios

Фрагмент с конца видео - Are We Alone? Galactic Civilization Challenge | Space Time | PBS Digital Studios

The Drake Equation tells us the likelihood that there are other advanced technological civilizations waiting for us among the stars. In this episode of Space Time we challenge you to use the Drake Equation to help us determine how near or far these alien races may be. Links to reference material below. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Everything we’ve learned about our universe tells us that it is very unlikely we are alone. Frank Drake and his Drake Equation compute exactly how unlikely this is. The answer may surprise you. Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown () A New Empirical Constraint on the Prevalence of Technological Species in the Universe Adam Frank & W.T. Sullivan III The Drake Equation G-type stars within 100 light years Prevalence of Earth-size planets orbiting Sun-like stars Erik A. Petigura, Andrew W. Howard, Geoffrey W. Marcy The Kepler Sample Planet Hunters X. KIC 8462852 - Where's the Flux? Tabby. S. Boyajian, et al.



What are the Strings in String Theory?

Фрагмент с начала видео - What are the Strings in String Theory?

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: To learn more about 23andMe head to Why strings? What are they made of? How did physicists even come up with this bizarre idea? And what’s all this nonsense of extra dimensions? You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: Computing a Universe Simulation Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Luke Maroldi Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () In physics we like to reduce down our description of the mechanics of reality to the simplest possible form. We expect the most fundamental machinery to have the fewest possible moving parts – or free parameters. This is why the standard model of particle physics is considered incomplete. Its equations predict many things with stunning accuracy, but they first require us to tune many mathematical knobs and dials. We need to use physical measurement to fix 19 free parameters like the masses of particles. And then there’s gravity, which doesn’t fit into the standard model at all. So surely there exists a deeper set of cogs and wheels – a theory that brings all observable phenomena into the same mechanical framework. That would be a theory of everything, and this is the great hope of string theory. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Justin Lloyd Anton Lifshits CoolAsCats David Nicklas Fabrice Eap Juan Benet Quasar Dean Fuqua James Flowers Mark Rosenthal Roman Pinchuk Tambe Barsbay Vinnie Falco Hypernova Chuck Zegar Dan Harris Donal Botkin Edmund Fokschaner John Hofmann Jordan Young Joseph Salomone Martha Hunt Matthew O’Connor Ratfeast Thanks to our Patreon Gamma Ray Burst Supporters: Alexander Rodriguez Alexey Eromenko Brandon Cook Brandon Labonte Daniel Lyons David Crane Fabian Olesen Fauzan Ardhana Greg Allen Greg Weiss Jack Frosch James Hughes JJ Bagnell Jon Folks Joseph Emison Josh Thomas Kevin Warne Malte Ubl Mark Vasile Nathan Leniz Nicholas Rose Nick Virtue Scott Gossett Shannan Catalano Shawn Azman Tommy Mogensen سلطان الخليفي



The Secrets of Feynman Diagrams | Space Time

Фрагмент с начала видео - The Secrets of Feynman Diagrams | Space Time

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Фрагмент с конца видео - The Secrets of Feynman Diagrams | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Unlock the secrets of Feynman Diagrams. Part 5 in our Quantum Field Theory series. And if you're submitting an answer to our challenge question email your answer by August 2nd to pbsspacetime [AT] gmail.com with the subject line Feynman Diagram Challenge. You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: The Real Star Wars Feynman’s path integral shows us that, to properly calculate the probability of a particle traveling from point A to point B, we need to add up the contributions from all conceivable paths between those points – including the impossible paths! In fact we can go even further: according to Feynman’s approach, every conceivable happening that leads from a measured initial state to a measured final state DOES in a sense happen. To calculate the probability of any quantum system evolving from one state into any other state we need to sum over every conceivable intermediate state. This is impossible because there are infinite possible intermediate states. Written and Hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Kurt Ross Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Comments answer by Matt: Superphilipp Lewinham Myrmidon Sure people love Star Wars. But I think they missed a golden opportunity to call the project Ronald Ray-gun. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats Shane Robinson David Nicklas Eugene Lawson Joshua Davis Quasar Tambe Barsbay Max Levine Mayank M. Mehrota Mars Yentur Josh Mark Rosenthal Dean Fuqua Hypernova Chuck Zegar Jordan Young Ratfeast John Hofmann Joseph Salomone Martha Hunt Craig Peterson Science Via Markets Barry Hatfield Thanks to our Patreon Gamma Ray Burst Supporters: Peter Durocher Michael Kers Chris Hicks Mark Vasile Patrick Murray Justin Lloyd Sultan Alkhulaifi Alex Seto Conor Dillon Jared Moore Michal-Peanut Karmi Bernardo Higuera Erik Stein Daniel Lyons Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss



Have They Seen Us? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Have They Seen Us? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Have They Seen Us? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Have They Seen Us? | Space Time | PBS Digital Studios

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Are aliens watching Earth TV? We'd like to credit the SKA Organization for the image used in the thumbnail. Support us on Patreon! Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help tranlate our videos! Sources and further reading: The Square Kilometer Array Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation Loeb & Zaldarriaga 2007, Journal of Cosmology and Astroparticle Physics, 1, 20 Costs and Difficulties of Large-Scale 'Messaging', and the Need for International Debate on Potential Risks Billingham & Bedford 2011 Previous Episode: Written and hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Made by Kornhaber Brown () Comments Answered by Matt: Luca$sino Douglas Oak Grin Reaper Of Trolls viermidebutura3 Cornerrecord Special thanks to our Patreon Big Bang, Hypernova and Quasar Supporters: Henry Van Styn Antonio Park Joel Brinton Luna IT Solutions Clock Watcher Joe Ratfeast Vitaly Kovalenko John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Jade Bilkey Kevin Warne JJ Bagnell J Rejc Bernardo Higuera Michael Fischer Dylan Merida Colette Weeks Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss David Matteson Marc Lagarde Eric Jackson Will and Sonja Marple



Absolute Cold | Space Time

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Фрагмент с конца видео - Absolute Cold | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Can we ever achieve absolute cold? Try CuriosityStream today: You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: When Quasars Collide STJC | Space Time Resources: Absolute Zero: Zero-Point Energy: Bose-Einstein Condensate: Alfred Leitner's Superfluid Liquid Helium: Links to Comments Response: Rcoates89 Joseph Gamble Dillan Burris Rubbergnome Many experimental physicists have spent their careers trying to cool things to absolute zero. This state of absolute cold is the zero-point on the Kelvin temperature scale, corresponding to -273.15 Celsius. Using lasers and magnetic fields, we’ve now managed to cool certain substances to less than a billionth of a Kelvin. Doing so has revealed some bizarre quantum states of matter. But quantum mechanics may also prevent us from ever reaching absolute zero. Understanding the limit to cold will lead us to an understanding of the nature of the quantum vacuum itself. Written and Hosted by Matt O'Dowd Produced by Rusty Ward Graphics by Kurt Ross Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang BITISM CoolAsCats David Nicklas Richard Senegor Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Y2 Justin Lloyd Hypernova Edmund Fokschaner Max Levine Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Dykstra Peter Durocher Michael Kers Chris Hicks Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Daniel Lyons Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss



The Black Hole Entropy Enigma | Space Time

Фрагмент с начала видео - The Black Hole Entropy Enigma | Space Time

Фрагмент с средины видео - The Black Hole Entropy Enigma | Space Time

Фрагмент с конца видео - The Black Hole Entropy Enigma | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Thanks to CuriosityStream for supporting PBS Digital Studios. You can learn more at and use the code spacetime during the sign-up process. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: Is There Life on Mars? Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Luke Maroldi Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Black Holes should have no entropy, but they in fact hold most of the entropy in the universe. Let’s figure this out. If black holes exist – which, apparently, they do – they contradict other theories in physics as sacred as general relativity. They cause all sorts of problems with quantum theory, which we’ve talked about and will review in a sec. But they also present an apparent conflict with the notion of entropy and the second law of thermodynamics. It was while pondering that conflict that Jacob Bekenstein realized an incredible connection between black holes and thermodynamics. His insight launched an entire new way of thinking about the universe in terms of information theory, and ultimately led to the holographic principle. Which I promise we’re getting to and we’re almost there. We just need to understand string theory first and to understand that, you’re going need to know about why Black Holes contain most of the universe’s entropy. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Anton Lifshits CoolAsCats David Nicklas Fabrice Eap Quasar Dean Fuqua Mark Rosenthal Mayank M. Mehrota Roman Pinchuk Tambe Barsbay Vinnie Falco Hypernova Brent Mullins Chuck Zegar Donal Botkin Edmund Fokschaner John Hofmann Jordan Young Joseph Salomone Matthew O’Connor Ratfeast Thanks to our Patreon Gamma Ray Burst Supporters: Alexander Rodriguez Alexey Eromenko Benoit Pagé-Guitard Brandon Cook Brandon Labonte Daniel Lyons David Crane Deborah Whittaker Fabian Olesen Greg Allen Greg Weiss James Flowers James Hughes JJ Bagnell Jon Folks Kevin Warne Malte Ubl Mark Vasile Nicholas Rose Nick Virtue Scott Gossett Shannan Catalano سلطان الخليفي



Will A New Neutrino Change The Standard Model?

Фрагмент с начала видео - Will A New Neutrino Change The Standard Model?

Фрагмент с средины видео - Will A New Neutrino Change The Standard Model?

Фрагмент с конца видео - Will A New Neutrino Change The Standard Model?

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Thanks to Curiosity Stream for supporting PBSDS. You can get the first 60 days free if you sign up at curiositystream.com/spacetime and use the code spacetime during the sign-up process. Since the discovery of the Higgs boson, physicists have searched and searched for any hint of new particles. That search has been fruitless. Until, perhaps, now. Today on Space Time Journal Club we’ll look at a paper that reports a compelling hint of a new particle outside the standard model: the sterile neutrino. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: How Asteroid Mining Will Save Earth Regular neutrinos are a bit aloof. They don’t interact by the electromagnetic or strong nuclear forces – only by the weak nuclear force and gravity. They are so weakly interacting that they pass through matter like it isn’t there. To have a 50-50 chance of stopping any given neutrino you’d need a wall of lead … one light year thick! If regular neutrinos are aloof, then sterile neutrinos are the complete loners. They don’t even interact via the weak interaction. Even so, detection of sterile neutrinos would be incredibly important. Besides being the first expansion of the standard model family since the Higgs boson, sterile neutrinos are a candidate for dark matter, and their existence would have had a huge influence on the expansion of the early universe. Hosted by Matt O'Dowd Written by Drew Rosen and Matt O'Dowd Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Anton Lifshits Joey Redner Fabrice Eap Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Vinnie Falco Hypernova Donal Botkin Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss Shannan Catalano Brandon Cook Malte Ubl



The One-Electron Universe | Space Time

Фрагмент с начала видео - The One-Electron Universe | Space Time

Фрагмент с средины видео - The One-Electron Universe | Space Time

Фрагмент с конца видео - The One-Electron Universe | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Could it be that all the electrons in the universe are simply one, single electron moving back and forth through time? You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Previous Episode: Dark Flow In the spring of 1940, the great physicist John Archibald Wheeler had a flash of insight. He picked up the phone and called Richard Feynman. The fateful conversation began, “Feynman, I know why all electrons have the same charge and the same mass. Why? asked Wheeler’s former graduate student. Because, they are all the same electron! Wheeler went on to describe the One-Electron Universe idea: that there exists only one electron, and that electron traverses time in both directions. It bounces in time, eventually traversing the entire past and future history of the universe in both directions, and interacting with itself countless times on each pass. In this way it fills the universe with the appearance of countless electrons. And when the electron is moving backwards in time it is a positron; the antimatter counterpart of the electron. Written and Hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Kurt Ross Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Comments answer by Matt: 0xFFF1 Daniel Grass M Paulson Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Quasar Tambe Barsbay Max Levine Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Hypernova Eugene Lawson Chuck Zegar Jordan Young Ratfeast John Hofmann Joseph Salomone Martha Hunt Craig Peterson Science Via Markets Barry Hatfield Thanks to our Patreon Gamma Ray Burst Supporters: Peter Durocher Michael Kers Chris Hicks Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Jared Moore Michal-Peanut Karmi Bernardo Higuera Erik Stein Daniel Lyons Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss



The Leap Second Explained | Space Time | PBS Digital Studios

Фрагмент с начала видео - The Leap Second Explained | Space Time | PBS Digital Studios

Фрагмент с средины видео - The Leap Second Explained | Space Time | PBS Digital Studios

Фрагмент с конца видео - The Leap Second Explained | Space Time | PBS Digital Studios

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Let us know what topics you want to learn more about: Every once in a while we add a second onto our days. Similar to the Leap Year, this is known as the Leap Second. But, if the Leap Year already helps us account for the offset from a calendar in days, what exactly does the Leap Second do? Check out this video for the answer! New SpaceTime episodes every Wednesday! Hosted by Gabe Perez-Giz Made by Kornhaber Brown ()



Horizon Radiation | Space Time

Фрагмент с начала видео - Horizon Radiation | Space Time

Фрагмент с средины видео - Horizon Radiation | Space Time

Фрагмент с конца видео - Horizon Radiation | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Learn about Horizon radiation and why it's essential for us to understand as we continue our journey towards the Unruh Effect and Hawking Radiation. You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: What Do Stars Sound Like? Source material for our Sounds of Stars episode: MPL3D Solar System - Star Sounds Both theories of relativity, special and general, tell us that many things are observer dependent. Different observers might disagree about the speeds, lengths, or times, but the laws of physics should be the same for everyone. And for two observers with very different, but constant speeds - inertial observers - the vacuum itself should appear the same. Hosted by Matt O'Dowd Written by Graeme Gossel and Matt O'Dowd Produced by Rusty Ward Graphics by Kurt Ross Assistant Editing and Sound Design by Mike Petrow and Meah Denee Barrington Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas William James Sidis Faisal Saud Anton Lifshits Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Y2 Justin Lloyd Tambe Barsbay Hypernova Edmund Fokschaner Max Levine Matthew O’Connor Eugene Lawson Martha Hunt Joseph Salomone Chuck Zegar Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Brandon Cook Mechanically Cryptic Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Dykstra Chris Hicks Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Daniel Lyons Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stiglmayr Benoit Pagé-Guitard Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss



The Vacuum Catastrophe

Фрагмент с начала видео - The Vacuum Catastrophe

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Фрагмент с конца видео - The Vacuum Catastrophe

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: If vacuum energy really does have the enormous value predicted by quantum field theory then our gently expanding, geometrically flat universe shouldn’t exist. This is the vacuum catastrophe. You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: The Missing Mask Mystery | Space Time Links to Comments Response: Michael Jeremy Zambelli TS1336 Eliran Cohen Let’s talk about vacuum energy from a theoretical standpoint. From the perspective of quantum field theory, every point in space is represented by a quantum oscillator; one for each elementary particle type. Higher energy oscillations represent the presence of real particles. However even the lowest possible energy oscillation – the one corresponding to the absence of particles – has some energy. Written and Hosted by Matt O'Dowd Produced by Rusty Ward Graphics by Kurt Ross Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang BITISM CoolAsCats David Nicklas Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Y2 Justin Lloyd Hypernova Edmund Fokschaner Max Levine Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Dykstra Chris Hicks Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Daniel Lyons Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stiglmayr Yubo Du Benoit Pagé-Guitard Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss



How Cosmic Inflation Flattened the Universe | Space Time | PBS Digital Studios

Фрагмент с начала видео - How Cosmic Inflation Flattened the Universe | Space Time | PBS Digital Studios

Фрагмент с средины видео - How Cosmic Inflation Flattened the Universe | Space Time | PBS Digital Studios

Фрагмент с конца видео - How Cosmic Inflation Flattened the Universe | Space Time | PBS Digital Studios

Let PBS know what type of digital series you'd like to see by taking this survey: How does Inflation solve the Big Bang’s problems? Get your own Space Time t-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Although much of the Big Bang Theory is widely accepted to be true, it only gets us part of the way there. Observable truths such as the CMB and the flatness of our universe reveal that there is no way the universe has been expanding at a constant rate since its beginning. It turns out Cosmic Inflation solves the Big Bang's major problems quite well. So well in fact, that we might not even need a Big Bang at all! FURTHER READING: Inflation (cosmology) Cosmological constant _____________________ COMMENTS: Frank Schneider . DBlanding23 . jodokastslo . Omicron Vega . ______________________ Written and hosted by Matt O’Dowd Made by Kornhaber Brown ()



Will Starshot's Insterstellar Journey Succeed? | Space Time | PBS Digital Studios

Фрагмент с начала видео - Will Starshot's Insterstellar Journey Succeed? | Space Time | PBS Digital Studios

Фрагмент с средины видео - Will Starshot's Insterstellar Journey Succeed? | Space Time | PBS Digital Studios

Фрагмент с конца видео - Will Starshot's Insterstellar Journey Succeed? | Space Time | PBS Digital Studios

Will Breakthrough Starshot make it to Alpha Centauri? Let's find out. Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Yuri Milner’s Breakthrough Starshot is an interstellar travel expedition unlike any other before it. It’s many years in the making and is contingent on a series of incredible advancements in nanotechnology, materials science and laser power. Despite these hurdles, the project has been backed by some of the greatest minds in science today, including Stephen Hawking, legendary engineer Freeman Dyson, UK Astronomer Royal Martin Rees and dark energy Nobel Laureate Saul Perlmutter. Just how likely is it that Starshot’s journey to Alpha Centauri will succeed? Written and hosted by Matt O’Dowd Made by Kornhaber Brown () And be sure to check out our good friend Physics Girl's video on Lightsails! Comments Satya Prakash Scot McPhee Sandeep Siwach Accessless Adrian Abdel ________________________________________________________________ Breakthrough Starshot Initiative Geoffrey Landis on light sails



The Physics of Life (ft. It's Okay to be Smart & PBS Eons!) | Space Time

Фрагмент с начала видео - The Physics of Life (ft. It's Okay to be Smart & PBS Eons!) | Space Time

Фрагмент с средины видео - The Physics of Life (ft. It's Okay to be Smart & PBS Eons!) | Space Time

Фрагмент с конца видео - The Physics of Life (ft. It's Okay to be Smart & PBS Eons!) | Space Time

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: It's OK to be Smart - Where Did Life Come From? Eons - What Was the Ancestor of Everything? Our universe is prone to increasing disorder and chaos. So how did it generate the extreme complexity we see in life? Actually, the laws of physics themselves may demand it. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: The Unruh Effect How did life begin? We can seek the answer in the chemistry of the early earth, or in the biology of the first cell. In fact our friends at PBS Eons and It’s OK to be Smart will do just that in companion videos to this one. But we all know that chemistry and biology are just applied physics. So can we approach the question of the origin and the very nature of life from the point of view of physics? We’re sure going to try. Hosted and written by Matt O'Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Anton Lifshits Joey Redner Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Hypernova Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Jordan Young Ratfeast John Hofmann Craig Peterson Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen TJMadison Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell J Rejc Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss



Noether's Theorem and The Symmetries of Reality

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: To learn more about Brilliant, you can go to Conservation laws are among the most important tools in physics. They feel as fundamental as you can get. And yet they’re wrong - or at least they’re only right sometimes. These laws are consequences of a much deeper, more fundamental principle: Noether’s theorem. You can further support us on Patreon at Get your own Space Time t­-shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! _. Previous Episode: How Gaia Changed Astronomy Forever . Conservation laws are the cheat codes of physics. They make it possible to solve physics problems that would otherwise be painfully difficult, or even impossible. More than cheat codes – conservation laws are close to the source code – they emerge from profound and simple truths about the basis of reality. They emerge from the fundamental symmetries of nature. The connection between conservation laws and symmetry is encapsulated in Noether’s theorem. But before we dive into this extremely elegant idea, let’s talk about the seeming paradox that inspired it, and the genius who discovered it. Written and hosted by Matt O'Dowd Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown () Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Anton Lifshits Joey Redner Fabrice Eap Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Hypernova Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss Shannan Catalano Brandon Cook



Supervoids vs Colliding Universes! | Space Time

Фрагмент с начала видео - Supervoids vs Colliding Universes! | Space Time

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Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: Could the mysterious Cold Spot found in the CMB be the result of a collision with a bubble universe? Try 23andMe at ____________________________________________________ [CORRECTION: The calculated ISW cooling from cold spot observed voids is 0.000032 Kelvin not 0.032 K as is listed on screen, the actual cold spot temperature differential is 0.000150 Kelvin not 0.15 K, and the actual ISW cooling from the control region is 0.000014 Kelvin not 0.014 K. The actual control region temperature differential is 0.000015 Kelvin not 0.015K. Thanks to Chris Morong for catching this discrepancy!] You can further support us on Patreon at Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Previous Episode: The Fate of the First Stars Space Time Journal Club examines Evidence Against a Supervoid Causing the CMB Cold Spot If you study a map of the Cosmic Microwave Background, or CMB, you may notice a large, deep blue splotch on the lower right. This area, creatively named the Cold Spot. Is this feature a statistical fluke, the signature of vast supervoids, or even the imprint of another universe? Written by Matt O’Dowd and Alexandra Yep Hosted by Matt O'Dowd Produced by Rusty Ward Graphics by Kurt Ross Made by Kornhaber Brown () Resources: Local Voids as the Origin of Large Scale CMB Anomalies Watching Worlds Collide Comments answer by Matt: Fjellreven yeme myky992 Andrew Wright Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Shane Robinson David Nicklas Samuel Dean Jacintho Eugene Lawson Simone “Evilsocket” Margaritelli Quasar Tambe Barsbay Coolascats Max Levine Hypernova Chuck Zegar Jordan Young Ratfeast John Hofmann Joseph Salomone Martha Hunt Science Via Markets Craig Peterson Thanks to our Patreon Gamma Ray Burst Supporters: Alex Seto Justin Lloyd Conor Dillon Jared Moore Michal-Peanut Karmi Bernardo Higuera Erik Stein Daniel Lyons Jade Bilkey Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss Eric Jackson



Solving the Three Body Problem

Фрагмент с начала видео - Solving the Three Body Problem

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Sign Up on Patreon to get access to the Space Time Discord! Check out the Space Time Merch Store The three body problem is famous for being impossible to solve. But actually it's been solved many times, and in ingenious ways. Some of those solutions are incredibly useful, and some are incredibly bizarre. Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer & Adriano Leal Post Production: Yago Ballarini, Max Willians, Pedro Osinski Directed by: Andrew Kornhaber Executive Producers: Eric Brown & Andrew Kornhaber Physics - and arguably all of science changed forever in 1687 when Isaac Newton published his Principia. Within it were equations of motion and gravity that transformed our erratic-seeming cosmos into a perfectly tuned machine of clockwork predictability. Given the current positions and velocities of the bodies of the solar system, Newton’s equations could be used in principle be used to calculate their locations at any distant time, future or past. I say “in principle” because the reality isn’t so simple. Despite the beauty of Newton’s equations, they lead to a simple solution for planetary motion in only one case - when two and only two bodies orbit each other sans any other gravitational influence in the universe. Add just one more body and in most cases all motion becomes fundamentally chaotic - there exists no simple solution. This is the three-body problem, and we’ve been trying to solve it for over 300 years. Special Thanks to Our Patreon Supporters: Big Bang Supporters: Alexander Tamas David Barnholdt David Nicklas Fabrice Eap John S Juan Benet Morgan Hough Quasar Supporters: Christina Oegren Mark Heising Vinnie Falco Hypernova Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John Pollock John R. Slavik Jordan Young Joseph Salomone Julian Tyacke Justin Ash Mathew Matthew O'Connor Syed Ansar Timothy McCulloch Hypernova Supporters: A G Adrian Hatch Adrien Molyneux AlecZero Andreas Nautsch Angela Prigge Bradley Jenkins Brandon labonte Craig Stonaha Dan Warren Daniel Lyons David Bethala DFaulk Eric Kiebler Frederic Simon Geoffrey Short Graydon Goss Greg Smith John Funai John Griffith John Robinson Jonathan Nesfeder Josh Thomas Kevin Lee Kevin Warne Kyle Hofer Malte Ubl Michael Conroy Nick Virtue Nick Wright Patrick Sutton Paul Rose Randall Sylvia Robert Ilardi Scott Gossett Sean Warniaha Sipke Schoorstra Steve Bradshaw Tatiana Vorovchenko Tim Stephani Tonyface Tybie Fitzhugh Yurii Konovaliuk



Watch THIS! (New Host + Challenge Winners) | Space Time | PBS Digital Studios

Фрагмент с начала видео - Watch THIS! (New Host + Challenge Winners) | Space Time | PBS Digital Studios

Фрагмент с средины видео - Watch THIS! (New Host + Challenge Winners) | Space Time | PBS Digital Studios

Фрагмент с конца видео - Watch THIS! (New Host + Challenge Winners) | Space Time | PBS Digital Studios

Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Hey Spacetimers! The time has finally come - on this weeks episode of Spacetime we reveal the answers to our 2-Particle Challenge, as well as our winners! Unfortunately, Gabe must bid us farewell - but not before introducing (in the most epic way), Space Time’s new host! Solutions: ABOUT MATT O'DOWD: Matt O'Dowd spends his time studying the universe, especially really far-away things like quasars, super-massive black holes, and evolving galaxies. He uses telescopes in space to do it, and if those aren't good enough he sometimes adds entire galaxies as gravitational lenses. Matt completed his Ph.D. studies at NASA's Space Telescope Science Institute, followed by work at the University of Melbourne and Columbia University. He's now a professor at the City University of New York and an Associate at the American Museum of Natural History's Hayden Planetarium. ----------------------------------------­­--------- Congratulations To Our Winners! Newtonian Challenge: Farbod Torabi Elias Simon Rahul Poddar Eduardo Vila Donald Loveland Einsteinian Challenge: Nick Lucid Daniel Grimmer If your name is listed above be sure to email pbsspacetime@gmail.com with your Full Name, Full Mailing Address, and preferred T-Shirt Size (small, medium, large, extra large etc.) ----------------------------------------­­--------- Let us know what topics you want to learn more about:



What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios

Фрагмент с начала видео - What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios

Фрагмент с средины видео - What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios

Фрагмент с конца видео - What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios

Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Lots of people believe the Universe is infinite, but there's a good possibility that might not be the case. Which means that there would be an actual edge of the Universe. What happens at that edge? Is there a restaurant? Join Matt on this week’s episode of Space Time as he explores the greatest expanses of our Universe. So what do you find when you reach the edge? More Universe? Bubble Universes? Back where you started?! Check out this episode of Space Time to find out! Measuring The Size of The Universe: Space Used To Be Orange: ----------------------------------------­­--------- COMMENTS: Squishina shadowmax889 MrLewooz izvarzone ----------------------------------------­­--------- REFERENCES: Krauss & Scherrer 2007 Vardanyan, Trotta & Silk, 2011 ----------------------------------------­­--------- Let us know what topics you want to learn more about:



Loop Quantum Gravity Explained

Фрагмент с начала видео - Loop Quantum Gravity Explained

Фрагмент с средины видео - Loop Quantum Gravity Explained

Фрагмент с конца видео - Loop Quantum Gravity Explained

Sign Up on Patreon to get access to the Space Time Discord! Check out the Space Time Merch Store It’s time we talked about loop quantum gravity. What exactly is it? What are the loops? And can it really defeat string theory in our quest for a Theory of Everything? Hosted by Matt O'Dowd Written by Graeme Gossel & Matt O'Dowd Graphics by Leonardo Scholzer Directed by: Andrew Kornhaber Executive Producers: Eric Brown & Andrew Kornhaber The holy grail of physics is to connect our understanding of the tiny scales of atoms and subatomic particles with that of the vast scales of planets, galaxies, and the entire universe. To connect quantum physics with Einstein’s general theory of relativity. Our search for a theory of quantum gravity is a century old, and we’ve talked quite a bit about it already, including what’s probably the lead contender - string theory. But string theory isn’t the only game in town - or so some physicists believe. There may be another way to reconcile the physics of the tiny and the gigantic - another way to a theory of quantum gravity that avoids a lot of conceptual baggage like tiny wiggling strings made of coiled up extra dimensions. That other way would be loop quantum gravity, and today we’re going to learn exactly what it is. Special Thanks to Our Patreon Supporters Big Bang Supporters: David Barnholdt David Boyer David Nicklas Fabrice Eap Juan Benet matt miller Morgan Hough Quasar: Mark Heising Mark Rosenthal Vinnie Falco Hypernova: chuck zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S joe pearce John Hofmann John R. Slavik Jordan Young Joseph Salomone Mathew Matthew O'Connor Syed Ansar Gamma Ray Burst: A G Adrien Molyneux AlecZero Andreas Nautsch Bradley Jenkins Brandon labonte Brian Dan Warren Daniel Lyons David Bethala DFaulk Frederic Simon Geoffrey Short Graydon Goss Greg Smith James Flowers John Funai John Griffith John Michael Kerr John Pollock John Robinson Jonathan Nesfeder Joseph Dillman Josh Thomas Kevin Lee Kevin Warne Kyle Hofer Malte Ubl Nick Virtue Nick Wright Paul Rose Scott Gossett Sean Warniaha Tim Stephani Tonyface Yurii Konovaliuk



The Strange Universe of Gravitational Lensing | Space Time | PBS Digital Studios

Фрагмент с начала видео - The Strange Universe of Gravitational Lensing | Space Time | PBS Digital Studios

Фрагмент с средины видео - The Strange Universe of Gravitational Lensing | Space Time | PBS Digital Studios

Фрагмент с конца видео - The Strange Universe of Gravitational Lensing | Space Time | PBS Digital Studios

Is what we see in the night sky a true representation of our universe? Find out about Gravitational Lensing in this episode and even more about it in the documentary that Matt made together with the Museum of Natural History:Distant Quasars: Shedding Light on Black Holes /astro/documentaries/distant-quasars-shedding-light-on-black-holes Get your own Space Time t­shirt at Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Support us on Patreon! Help translate our videos! Niels Bohr, a Danish Physicist said “Everything we call real is made of things that cannot be regarded.” Is what we see perceived to be real or is it an illusion? In the world of our mind’s eye, light travels in a straight line. In reality, spacetime is deflected and magnified through the lens of gravity. Find out how this works and what it allows us to learn about our universe in this episode of Space Time. Written and hosted by Matt O’Dowd Made by Kornhaber Brown () Comments by: AyyElMao Błażej Michalik Flynn Kruchell Mystyc Cheez


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