PBS Space Time
10
2015
Documentary
, Talk
Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth with our astrophysicist host: Matthew O’Dowd.
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- Cast:
Episode 44 : Why String Theory is Wrong
December. 20,2018
There’s this idea that beauty is a powerful guide to truth in the mathematics of physical theory. String theory is certainly beautiful in the eyes of many physicists. Beautiful enough to pursue even if it’s wrong?
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Episode 43 : Quantum Physics in a Mirror Universe
December. 12,2018
When you look in mirror, and see what you think is a perfect reflection. You might be looking at universe whose laws are fundamentally different.
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Episode 42 : Did Life on Earth Come from Space?
December. 06,2018
How did life on Earth get started? Did life on Earth originate on another planet? Either Mars, or in a distant solar system? Could Earth life have spread to have seeded life elsewhere? Let’s see what modern science has to say about the plausibility of panspermia.
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Episode 41 : 'Oumuamua Is Not Alien
November. 21,2018
To repeat the space time maxim: it’s never aliens … until it is. So let’s talk about ‘oumuamua.
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Episode 40 : Supersymmetric Particle Found?
November. 14,2018
With the large hadron collider running out of places to look for clues to a deeper theory of physics, we need a bigger particle accelerator. We have one - the galaxy.
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Episode 39 : Why String Theory is Right
November. 07,2018
Some see string theory as the one great hope for a theory of everything – that it will unite quantum mechanics and gravity and so unify all of physics into one glorious theory.
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Episode 38 : Are Virtual Particles A New Layer of Reality?
October. 31,2018
Let me tell you a story about virtual particles. It may or may not be true.
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Episode 37 : Will We Ever Find Alien Life?
October. 25,2018
The silence of the galaxy and the resulting Fermi Paradox has perplexed us for nearly 50 years. But our most recent surveys of the Milky Way finally allow us to draw scientific conclusions about the depressingly persistent absence of aliens.
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Episode 36 : What are the Strings in String Theory?
October. 18,2018
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?
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Episode 35 : Computing a Universe Simulation
October. 10,2018
Physics seems to be telling us that it’s possible to simulate the entire universe on a computer smaller than the universe.
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Episode 34 : How to Detect Extra Dimensions
October. 03,2018
Physics seems to be telling us that it’s possible to simulate the entire universe on a computer smaller than the universe.
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Episode 33 : Quantum Gravity and the Hardest Problem in Physics
September. 20,2018
Between them, general relativity and quantum mechanics seem to describe all of observable reality.
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Episode 32 : How Much Information is in the Universe?
September. 12,2018
There’s quite a bit of stuff in the universe, to put it mildly.
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Episode 31 : The Black Hole Entropy Enigma
September. 05,2018
Black Holes should have no entropy, but they in fact hold most of the entropy in the universe. Let’s figure this out.
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Episode 30 : Is There Life on Mars?
August. 30,2018
There is no greater hero in our search for life on mars than a little robot named Opportunity.
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Episode 29 : How Will the Universe End?
August. 23,2018
We live in an unusual age – the age when the stars still shine. We should count ourselves lucky – nearly all of future history will be dark. But events will still unfold in that long, cooling darkness, and civilizations may endure. So how will the universe and its far-future denizens spend eternity?
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Episode 28 : Quantum Theory's Most Incredible Prediction
August. 15,2018
Let’s talk about the best evidence we have that the theories of quantum physics truly represent the underlying workings of reality.
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Episode 27 : How Close To The Sun Can Humanity Get?
August. 01,2018
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Episode 26 : Reversing Entropy with Maxwell's Demon
July. 25,2018
Can a demon defeat the 2nd Law of Thermodynamics?
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Episode 25 : The Misunderstood Nature of Entropy
July. 18,2018
Entropy and the second law of thermodynamics has been credited with defining the arrow of time.
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Episode 24 : Quantum Invariance & The Origin of The Standard Model
July. 11,2018
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.
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Episode 23 : Will A New Neutrino Change The Standard Model?
July. 04,2018
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.
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Episode 22 : How Asteroid Mining Will Save Earth
June. 27,2018
The days of oil may be numbered, but there’s another natural resource that’s never been touched, Asteroids.
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Episode 21 : The Black Hole Information Paradox
June. 20,2018
We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at the speed of light. Nothing can travel faster than light, and so nothing can escape from below the event horizon- not matter, not light, not even information.
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Episode 20 : What Survives Inside A Black Hole?
June. 13,2018
We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at the speed of light. Nothing can travel faster than light, and so nothing can escape from below the event horizon- not matter, not light, not even information.
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Episode 19 : Why Quantum Information is Never Destroyed
May. 23,2018
If you have perfect knowledge of every single particle in the universe, can you use the laws of physics to rewind all the way back to the Big Bang? Is the entire history of the universe perfectly knowable? Or has information somehow lost along the way?
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Episode 18 : Noether's Theorem and The Symmetries of Reality
May. 16,2018
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.
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Episode 17 : How Gaia Changed Astronomy Forever
May. 09,2018
The great advances in any science tend to come in sudden leaps. April 25th of 2018 marks the beginning of just such a leap for much of astronomy. In the early hours of the morning, the Gaia mission’s second data release dropped. Our understanding of our own galaxy will never be the same again.
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Episode 16 : The Star at the End of Time
May. 02,2018
If we, or any conscious being is around to witness the very distant future our galaxy, what will they see? How long will life persist as the stars begin to die?
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Episode 15 : Black Hole Swarms
April. 25,2018
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.
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Episode 14 : Using Stars to See Gravitational Waves
April. 18,2018
Now that gravitational waves are definitely a thing, it’s time to think about some of the crazy things we can figure out with them. In some cases we’re going to need a gravitational wave observatory - in fact, we've already built one.
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Episode 13 : Physics of Life
April. 11,2018
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.
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Episode 12 : The Unruh Effect
April. 04,2018
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.
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Episode 11 : The Andromeda-Milky Way Collision
March. 28,2018
The Andromeda galaxy is heading straight toward our own Milky Way. The two galaxies will inevitably collide. Will that be the very last night sky our solar system witnesses?
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Episode 10 : Scientists Have Detected the First Stars
March. 21,2018
What do the first stars in the universe, dark matter, and superior siege engines have in common?
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Episode 9 : Hawking Radiation
March. 15,2018
It’s the most famous prediction of perhaps the most famous genius of our time ... Stephen Hawking's theory of Hawking Radiation
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Episode 8 : Should Space be Privatized?
March. 07,2018
Will the future of space exploration be guided by public or private entities? Which is better?
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Episode 7 : The Trebuchet Challenge
February. 28,2018
Do you have what it takes to calculate the awesome power of the trebuchet?
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Episode 6 : The Death of the Sun
February. 21,2018
What exactly will happen when the sun dies?
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Episode 5 : What is Energy?
February. 14,2018
Energy is the most powerful and useful concept in all of physics, but what exactly is it?
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Episode 4 : Kronos: Devourer Of Worlds
January. 31,2018
What happens when a star eats its planets? Find out on today’s Space Time Journal Club.
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Episode 2 : Horizon Radiation
January. 17,2018
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.
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Episode 1 : What Do Stars Sound Like?
January. 10,2018
We can now map the interiors of stars by “listening” to their harmonies as they vibrate with seismic waves.
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