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PBS Space Time
The Strange Universe of Gravitational Lensing
In the world of our mind’s eye, light travels in a straight line. In reality, spacetime is deflected and magnified through the lens of gravity. Find out how this works and what it allows us to learn about our universe in this episode of Space Time.
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11:37
Nothing can escape from below the event horizon- not matter, light, or even information.
11:03
Nothing can escape from below the event horizon- not matter, light, or even information.
10:06
Is the entire history of the universe perfectly knowable? Or has information been lost?
9:38
Flawed conservation laws are consequences of a much deeper principle: Noether’s theorem.
8:47
New Gaia mission data has dramatically changed how we understand our own galaxy.
8:33
We can now see that the Milky Way is swarming with tens of thousands of black holes.
8:36
We’re going to need a gravitational wave observatory - in fact, we've already built one.
10:44
How did our chaotic universe generate the extreme complexity we see in life?
10:52
A black hole can never catch up to you, but the Unruh radiation it generates sure can.
9:15
The Andromeda galaxy will inevitably collide with our own Milky Way. Will that be the end?
9:03
What do the first stars, dark matter, and superior siege engines have in common?