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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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Have We SolvedThe Black Hole Information Paradox
11:37
Nothing can escape from below the event horizon- not matter, light, or even information.
What Survives Inside A Black Hole?
11:03
Nothing can escape from below the event horizon- not matter, light, or even information.
Why Quantum Information is Never Destroyed
10:06
Is the entire history of the universe perfectly knowable? Or has information been lost?
Noether's Theorem and The Symmetries of Reality
9:38
Flawed conservation laws are consequences of a much deeper principle: Noether’s theorem.
How Gaia Changed Astronomy Forever
8:47
New Gaia mission data has dramatically changed how we understand our own galaxy.
The Star at the End of Time
8:55
How long will life persist as the stars begin to die?
Black Hole Swarms
8:33
We can now see that the Milky Way is swarming with tens of thousands of black holes.
Using Stars to See Gravitational Waves
8:36
We’re going to need a gravitational wave observatory - in fact, we've already built one.
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?
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