Astronomy

PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE ***** Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Fact: in a black hole, all of the mass is concentrated at the singularity at the very center. Fact: every black hole singularity is surrounded by

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Find out how traveling faster than light and traveling back in time are the same thing. And be sure to tell PBS what types of shows you want to see at https://www.surveymonkey.com/r/pbsds2017 25 random participants in the

Thank you to Wren for supporting PBS. To learn more, go to https://wren.co/start/spacetime. PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE ***** Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime We routinely simulate the universe on all of its scales, from planets to

PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE ***** Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime If you used every particle in the observable universe to do a full quantum simulation, how big would that simulation be? At best a large molecule.

PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE ***** Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime On our search for alien lifeforms we scan for primitive biosignatures, and wait and hope for their errant signals to happen by the Earth. But that

Let PBS know what type of digital series you’d like to see by taking this survey: https://www.surveymonkey.com/r/pbsds2016 How does Inflation solve the Big Bang’s problems? Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://pbsspacetime.com/ It’s time we talked about loop quantum gravity. What exactly is it? What

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://pbsspacetime.com/ Invitation to Time Travelers: https://www.youtube.com/post/UgzeIA0O00-bVioxU4t4AaABCQ Time travel stories are cool because both the

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Dark energy, what exactly does it do? Find out in this episode of Space Time! Part 3 in our Dark Energy series. Part 1: https://www.youtube.com/watch?v=xZTb6sfHEX8 Part 2: https://www.youtube.com/watch?v=-4PayaEgEZc ____________________________________________________________ Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Between them, general relativity and quantum mechanics seem to describe all of observable reality. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t­-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime

Learn More about Brilliant: https://brilliant.org/SpaceTime/ Take the PBS Digital Studios audience survey: https://to.pbs.org/2021survey Black holes are a paradox. They are paradoxical because they simultaneously must exist but can’t, and so they break physics as we know it. Many physicists will tell you that the best way to fix broken physics is with string. String theory,

Thank you to CuriosityStream for supporting PBS. For more information go to https://curiositystream.thld.co/PBSSPACETIME Check Out @PBSVitals here: https://youtu.be/FOL0Hs8UcNs What if there is no such thing as dark matter? What if our understanding of gravity is just wrong? New work is taking another shot at that Einstein guy. Let’s see if we’ve finally scored a hit

Learn More About NordVPN at: https://nordvpn.com/spacetime It’s about time we discussed an obscure concept in physics that may be more fundamental than energy and entropy and perhaps time itself. That’s right – the time has come for Action. Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Carl Sagan’s famous words: “We are star stuff” refers to a mind-blowing idea – that most atomic nuclei in our bodies were created in the nuclear furnace and the explosive deaths of stars that

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE 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

Check Out American Voices: Keep it Close: https://youtu.be/LMJqb5A51_Y The people behind the greatest leaps in physics – Einstein, Newton, Heisenberg, all had the uncanny ability to see the fundamentals – see the deepest, underlying facts about the world, and from simple statements about reality they built up their incredible theories. Well what if we all

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Thank you to Brilliant for sponsoring this episode! To find out more, visit: https://brilliant.org/SpaceTime We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical

Let’s build a black hole! Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Black holes have mystified physicists for decades, but with the help of quantum mechanics, we are beginning to make serious progress in understanding these strange

Learn More about Brilliant: https://brilliant.org/SpaceTime/ Paradoxically, the most promising prospects for moving matter around faster than light may be to put a metaphorical brick wall in its way. New efforts in quantum tunneling – both theory and experiment – show that superluminal motion may be possible, while still managing to avoid the paradox of superluminal

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime What happens if you cut a bar magnetic in half? We get two magnets, each with their own North and South poles. But what happens if you keep on cutting, into fourths and eighths and sixteenths and so on? Will we ever

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE To learn more about Brilliant, you can go to https://brilliant.org/spacetime/ 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

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Black holes are very well known but… What is a White Hole? Get 15% off your next purchase at https://www.legalzoom.com/spacetime. LegalZoom is not a law firm or a substitute for the advice of an attorney. You can

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Today I’m going to explain why you’re not falling through your chair right now using one simple fact, and one object. The fact is that all electrons are the same as each other, and the object is a structurally critical item of

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime We’ve traveled to lots of weird places on this show – from the interiors of black holes to the time before the big bang. But today I want to take you on a journey to what has got to be the weirdest

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE 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 https://www.patreon.com/pbsspacetime Get your own

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime The universe is going to end. But of all the possible ends of the universe vacuum decay would have to be the most thorough – because it could totally rewrite the laws of physics. Today I hope to help you understand exactly

Check Out Megawow on PBS Kids: https://youtu.be/meU4f31gqYI In the Many Worlds interpretation of quantum mechanics, the universal wavefunction is the reality, encompassing all possible histories and futures and all exist. But we are only sensitive to a slice of the wavefunction corresponding to our “world”, and due to the superposition principle our world can happily

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ https://www.patreon.com/pbsspacetime We know that gravity exerts its pull on light, and we have an explanation for why. Actually, we have multiple explanations that all predict the same thing. And at first glance, these explanations

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime A new white dwarf has been discovered (poetically named: ZTF J1901+1458) that’s doing some stuff that no white dwarf should ever be able to do. In fact, it has multiple properties that are so extreme that it almost certainly did NOT form

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Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Many Worlds interpretation of quantum mechanics proposes that every time a quantum event gets decided, the universe splits so that every possible outcome really does occur. But where exactly are those worlds, and can we ever see them? Check out the Space

To check out any of the lectures available from Great Courses Plus go to http://ow.ly/dweH302dILJ 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 http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Many Worlds interpretation of quantum mechanics proposes that every time a quantum event gets decided, the universe splits so that every possible outcome really does occur. But where exactly are those worlds, and can we ever see them? Check out the Space

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE It’s OK to be Smart – Where Did Life Come From? https://youtu.be/_uAJY1mqtw4 Eons – What Was the Ancestor of Everything? https://youtu.be/pk213XSSktQ Our universe is prone to increasing disorder and chaos. So how did it generate the extreme

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Quantum mechanics has a lot of weird stuff – but there’s thing that everyone agrees that no one understands. I’m talking about quantum spin. Let’s find out how chasing this elusive little behavior of the electron led us to some of the

The double slit experiment radically changed the way we understand reality. To check out any of the lectures available from The Great Courses Plus go to http://ow.ly/QVaz302duhX and get ready to learn about everything from cooking to calculus. Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Sign up for the

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Entropy is surely one of the most perplexing concepts in physics. It’s variously described as a measure of a system’s disorder – or as the amount of useful work that you can get from it – or as the information hidden by

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Check out the Space Time Merch Store https://pbsspacetime.com/ Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Lots of people believe the Universe is infinite, but there’s a good possibility that

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime How many times can I half the distance between my hands? Assume perfect coordination and the ability to localize my palms to the quantum level. 15 halvings gets them to within a cell’s width. 33 to within a single atom, 50 and

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE How to predict the path of a quantum particle. Part 3 in our Quantum Field Theory Series. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us!

What can you trust in Spacetime? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g 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

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE 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 https://www.patreon.com/pbsspacetime Get your own Space Time t­shirt at

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime It’s fair to say that black holes may be the scariest objects in the universe. Happily for us, the nearest is probably many light-years away. Unless of course, Planck relics are a thing – in which case they might be literally everywhere.

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