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PBS Space Time

Can a Circle Be a Straight Line?

Season 1 Episode 20

On this week's episode of Spacetime, Gabe talks about what it actually means for a line to be straight so we can better understand what we mean by the idea of "curved Spacetime". This is Part One of our series on General relativity, so be sure to check it out!

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Season
The Physics of Life (ft. It's Okay to be Smart & PBS Eons!)
10:44
How did our chaotic universe generate the extreme complexity we see in life?
The Unruh Effect
10:52
A black hole can never catch up to you, but the Unruh radiation it generates sure can.
The Andromeda-Milky Way Collision
9:15
The Andromeda galaxy will inevitably collide with our own Milky Way. Will that be the end?
Scientists Have Detected the First Stars
9:03
What do the first stars, dark matter, and superior siege engines have in common?
Hawking Radiation
12:00
Stephen Hawking's most famous prediction: the theory of Hawking Radiation.
Should Space be Privatized?
9:16
Will the future of space exploration be guided by public or private entities?
The Trebuchet Challenge
8:25
Do you have what it takes to calculate the awesome power of the trebuchet?
The Death of the Sun
9:01
What exactly will happen when the sun dies?
What is Energy?
11:20
Energy is the most powerful and useful concept in all of physics, but what exactly is it?
Kronos: Devourer Of Worlds
7:42
What happens when a star eats its planets? Find out on today’s Space Time Journal Club.
The End of the Habitable Zone
9:55
The Sun is getting brighter and the habitable planets in our solar system are changing.
Horizon Radiation
12:03
What is Horizon radiation? How does it apply to the Unruh Effect and Hawking Radiation?
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