Category: Science (Page 6 of 40)

What If Humanity Is Among The First Spacefaring Civilizations?

November 9, 2022 / / 0 Comments

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Half of the universe is filled with expansionist alien civilizations, and it’s only a matter of time before they’ll reach us. OK, that sounded a little sensationalist. But it’s also the conclusion of a recent astrophysics paper. Let’s see how they figure this, and whether we should take it seriously.

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Why Did Quantum Entanglement Win the Nobel Prize in Physics?

October 26, 2022 / / 0 Comments

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The Nobel prize in physics is typically awarded to scientists who make sense of nature; those whose discoveries render the universe more comprehensible. But the 2022 Nobel has been awarded to three physicists who revealed that the universe is even stranger than we thought thanks to Quantum Entanglement

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Previous Episodes Mentioned:
Quantum Entanglement and The Great Bohr Einstein Debate: https://youtu.be/tafGL02EUOA
Pilot Wave Theory and Quantum Realism: https://youtu.be/RlXdsyctD50
What If we Live In a Superdeterministic Universe: https://youtu.be/JnKzt6Xq-w4

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Executive in Charge for PBS: Maribel Lopez
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Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
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The Equation That Explains (Nearly) Everything!

October 19, 2022 / / 0 Comments

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The Standard Model of particle physics is arguably the most successful theory in the history of physics. It predicts the results of experiments with a numerical precision unmatched by any other branch of science, and it does so almost unfailingly. The theory is encapsulated in a single equation known as the Standard Model Lagrangian. Today we’re going to explain to you how it works!

Want to Dive Deeper into the Standard Model Lagrangian? Check out:
https://www.youtube.com/watch?v=kixAljyfdqU&list=PLsPUh22kYmNBgF_VMMLHFK0lbQGlVGk3v&ab_channel=PBSSpaceTime

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Executive in Charge for PBS: Maribel Lopez
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Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
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The REAL Possibility of Mapping Alien Planets!

October 12, 2022 / / 0 Comments

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I’m going to tell you about the craziest proposal for an astrophysics mission that has a good chance of actually happening. A train of spacecraft sailing the sun’s light to a magical point out there in space where the Sun’s own gravity turns it into a gigantic lens. What could such a solar-system-sized telescope do? Pretty much anything. But definitely map the surfaces of alien worlds.

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Why Is 1/137 One of the Greatest Unsolved Problems In Physics?

September 28, 2022 / / 0 Comments

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The Fine Structure Constant is one the strangest numbers in all of physics. It’s the job of physicists to worry about numbers, but there’s one number that physicists have stressed about more than any other. That number is 0.00729735256 – approximately 1/137. This is the fine structure constant, and it appears everywhere in our equations of quantum physics, and we’re still trying to figure out why.

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Science of the James Webb Telescope Explained!

September 21, 2022 / / 0 Comments

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You’ve probably heard about the James Webb Space Telescope and seen some cool pictures. But why should astronomers have all the fun? How do we get to use this new toy ourselves?

JWST Links:
Galactic Hunter JWST image processing guide: https://www.youtube.com/watch?v=hkdf-LhldPU
MAST space telescope archive: https://archive.stsci.edu/
STScI Data Analysis Toolbox: https://www.stsci.edu/jwst/science-execution/data-analysis-toolbox
Anton Petrov: https://youtu.be/w7-2F5ixznM & https://youtu.be/TYxf3W2M7c4
How To Process JWST Images: https://youtu.be/DVuonz26P0w

If you’re a Space Time fan and you use the JWST (whether it’s using the data, colorizing photos or using it in some other interesting way) send us an email @ pbsspacetime@gmail.com with the Subject Line “Using the JWST” and we’ll try to find a way to shout you out!

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Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
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Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
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Could the Higgs Boson Lead Us to Dark Matter?

September 14, 2022 / / 0 Comments

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The discovery of the Higgs boson ten years ago in the Large Hadron Collider was the culmination of decades of work and the collaboration of 1000s of brilliant and passionate people. It was the final piece needed to confirm the standard model of particle physics as it now stands. There are still many outstanding questions – for example, it seems like nothing in the standard model can explain what dark matter is. So the discovery of the Higgs wasn’t the end of particle physics – but it may be the way forward. Many physicists think that the secret to finding the elusive dark matter particle will come by studying the Higgs. In fact, the first tantalizing evidence is already in.

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Hosted by Matt O’Dowd
Written by Euan McLean & Matt O’Dowd
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Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
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Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2022 PBS. All rights reserved.

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What Makes The Strong Force Strong?

August 24, 2022 / / 0 Comments

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Quantum mechanics gets weirder as you go to smaller sizes and higher energies. It’s strange enough for atoms, but positively bizarre when we get to the atomic nucleus. And today we’re going nuclear, as we dive into the weird world of quantum chromodynamics and the strong force.

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What If Dark Energy is a New Quantum Field?

August 17, 2022 / / 0 Comments

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What is Quintessence? Well we know that something is up with the way the universe is expanding – there’s some kind of anti-gravitational effect that’s causing the expansion to accelerate. We don’t know what it is – just that it competes against the inward-pulling effect of gravity. And it’s winning – it looks like the universe will expand forever, at an ever-increasing rate. We call this mysterious influence dark energy, but while we’ve talked a lot about how it behaves, we’ve never really explored what it is. So, what is dark energy, really?

One strong possibility is quintessence. Quintessence is a hypothetical form of dark energy, more precisely a scalar field. Watch the episode to learn more.

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What Happens Inside a Proton?

August 3, 2022 / / 0 Comments

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If we ever want to simulate a universe, we should probably learn to simulate even a single atomic nucleus. But it’s taken some of the most incredible ingenuity of the past half-century to figure out how that out. All so that today I can teach you how to simulate a very very small universe.

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