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PBS 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. Host Matt O'Dowd breaks down the both the basic and incredibly complex sides of space and time.

Stories

December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 12, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...
December 11, 2017
Space Time explores the outer reaches of space, the craziness of astrophysics,...

Episodes

Season 4
When you look in mirror, and see what you think is a perfect reflection, you might be...
Season 4
How did life on Earth get started? Did life on Earth originate on another planet? Either...
Season 4
To repeat the space time maxim: it’s never aliens … until it is. So let’s talk about ‘...
Season 4
With the large hadron collider running out of places to look for clues to a deeper theory...
Season 4
Some see string theory as the one great hope for a theory of everything – that it will...
Season 4
Let me tell you a story about virtual particles. It may or may not be true.
Season 4
The silence of the galaxy and the resulting Fermi Paradox has perplexed us for nearly 50...
Season 4
Why strings? What are they made of? How did physicists even come up with this bizarre...
Season 4
Physics seems to be telling us that it’s possible to simulate the entire universe on a...
Season 4
On this Space Time Journal Club we look at how gravitational waves can be used to search...
Season 4
Between them, general relativity and quantum mechanics seem to describe all of observable...
Season 4
Billions of galaxies, each with billions of stars, each with … rather a lot of particles...
Season 4
Black Holes should have no entropy, but they in fact hold most of the entropy in the...
Season 4
We live in an unusual age – the age when the stars still shine. We should count ourselves...
Season 4
Quantum field theory is notoriously complicated, built from mind-bendingly abstract...
Season 4
The Sun: an entity worshipped as a god throughout time and across cultures. The source of...
Season 4
The second law of thermodynamics – the law that entropy must, on average, increase – has...
Season 4
Entropy is surely one of the most intriguing and misunderstood concepts in all of physics...
Season 4
Our laws of physics are equations of motion, along with some associated constants. We’ve...
Season 4
Since the discovery of the Higgs boson, physicists have searched and searched for any...
Season 4
The days of oil may be numbered, but there’s another natural resource that’s never been...
Season 4
Black holes are the result of absolute gravitational collapse of a massive body: a point...
Season 4
Black holes are the result of absolute gravitational collapse of a massive body: a point...
Season 4
If you have perfect knowledge of every single particle in the universe, can you use the...
Season 4
Conservation laws are among the most important tools in physics. They feel as fundamental...
Season 4
The great advances in any science tend to come in sudden leaps. April 25th of 2018 marks...
Season 4
If we, or any conscious being is around to witness the very distant future our galaxy,...
Season 4
It’s been conjectured that the center of the Milky Way is swarming with tens of thousands...
Season 4
Now that gravitational waves are definitely a thing, it’s time to think about some of the...
Season 4
Our universe is prone to increasing disorder and chaos. So how did it generate the...
Season 4
Worried about black holes? Consider this: Every time you accelerate - you generate an...
Season 4
The Andromeda galaxy is heading straight toward our own Milky Way. The two galaxies will...
Season 4
What do the first stars in the universe, dark matter, and superior siege engines have in...
Season 4
It’s the most famous prediction of perhaps the most famous genius of our time ... Stephen...
Season 4
Will the future of space exploration be guided by public or private entities? Which is...
Season 4
What exactly will happen when the sun dies?
Season 4
Energy is the most powerful and useful concept in all of physics, but what exactly is it?
Season 4
What happens when a star eats its planets? Find out on today’s Space Time Journal Club.
Season 4
The Sun is getting brighter and the planets in our solar system that are habitable are...
Season 4
Learn about Horizon radiation and why it's essential for us to understand as we continue...
Season 4
We can now map the interiors of stars by “listening” to their harmonies as they vibrate...
Season 4
Find out about the last time and the next time the Earth will be hit by a Gamma-ray Burst.
Season 4
We were recently visited by a traveler from outside our solar system. This is the first...
Season 4
Sometimes intuitive, large-scale phenomena can give us incredible insights into the...
Season 4
The professional astronomer or astrophysicist is a pretty recent phenomenon. In the past...
Season 4
Let’s take a moment to remember the selfless sacrifices made by some amazing robotic...
Season 4
Let’s talk about the mysterious zero-point energy and what it really can, and really can’...
Season 4
If vacuum energy really does have the enormous value predicted by quantum field theory...

Specials

What happens when matter can’t get any denser yet somehow does? The answer - it becomes...
Did all of dark energy just vanish? A team of scientists have just analyzed new data and...
Is our universe a definitive single reality or is it merely one within an infinitely...
Elon Musk’s SpaceX program proposes that 100 people could be sent to colonize Mars within...
Primordial black holes may be lurking throughout our universe. How large are they, how...
The Hubble Telescope found more evidence of vast plumes of water bursting through the icy...
Albert Einstein strongly disagreed with Niels Bohr when it came to Bohr’s interpretation...
We’ll soon be capable of building self-replicating robots. This will not only change...


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Blast off into the cosmos with astrophysicist Matt O'Dowd.