2021 End of Year AMA!

December 10th, 2021


Are Black Holes Actually Fuzzballs?

November 17th, 2021

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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, in fact. And in the black holes of string theory – fuzzballs – are perhaps even weirder than the regular type.

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What If Our Understanding of Gravity Is Wrong?

November 10th, 2021

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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 with Modified Newtonian Dynamics aka MOND.

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Is ACTION The Most Fundamental Property in Physics?

November 2nd, 2021

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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.

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Will Constructor Theory REWRITE Physics?

October 20th, 2021

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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 had a recipe book for doing exactly this. Well, one might be just around the corner and it’s called Constructor Theory.

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New Results in Quantum Tunneling vs. The Speed of Light

October 13th, 2021

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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 signaling.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 signaling.

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Relativistic Tunneling Paper
https://iopscience.iop.org/article/10.1088/1367-2630/abb515/pdf

Nature Paper
https://www.nature.com/articles/s41586-020-2490-7?proof=t

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Why Magnetic Monopoles SHOULD Exist

October 5th, 2021

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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 get to a single pole? I’ll spoil the answer for you: we don’t know! But the idea of magnetic monopoles remains one of physics’ most tantalizing maybes.

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How Electron Spin Makes Matter Possible

September 21st, 2021

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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 my clothing. There’s a chance this episode could get very weird.

Electrons DO NOT Spin
https://youtu.be/pWlk1gLkF2Y

Spin Renderings by the Incredible Jason Hise
http://entropygames.net/

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Neutron Stars: The Most Extreme Objects in the Universe

September 15th, 2021

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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 place in the modern universe – a place where matter exists in states I bet you’ve never heard of. Today we take a journey to the center of the neutron star.

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First Detection of Light from Behind a Black Hole

September 7th, 2021

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How do you see the unseeable – how do you explore the inescapable? Our cleverest astronomers have figured out ways to catch light that skims the very edge of black holes. Let’s find out what they learned.

A few weeks ago a story made the rounds of pop-sci media proclaiming that for the first time light had been detected from behind a black hole. The reports were about a paper that claimed to have seen X-rays that came not from inside but from the back end black hole. This is obviously cool stuff – I mean, really anything new with black holes captures the public attention. But this result is cool in ways most people aren’t aware. And it brought us closer to a goal that I’ve been personally striving towards for years – trying to understand what happens in the vicinity of the largest black holes in the universe. I thought it would be worth doing a space time journal club on the Nature paper by Wilkins, Gallo, Costantini, Brandt & Blandford so I get to talk about my favorite subject in the universe.

Nature Paper
https://www.nature.com/articles/s41586-021-03667-0

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#space #blackholes #astrophysics

Hosted by Matt O’Dowd
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Graphics by Leonardo Scholzer, Yago Ballarini, Pedro Osinski, Adriano Leal & Stephanie Faria
GFX Visualizations: Ajay Manuel
Directed by Andrew Kornhaber
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End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

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