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PBS Space Time
The Crisis in Cosmology
Season 5
Episode 9
The search for a single number: the hubble constant, which is the rate of expansion of our universe, has consumed astronomers for generations. Finally, two powerful and independent methods have refined its measurement to unprecedented precision. The only problem is that they don’t agree. This calls into question some of our most basic assumptions about the universe.
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16:11
Just how much stronger is this year’s solar activity going to get?
17:25
So you’ve decided to jump into a black hole...
12:51
We only recently figured out where cosmic rays are coming from.
13:28
Black hole complementarity may force us to rethink what it means to say that it exists.
20:15
To travel the stars without faster than light travel we’re going to need a generation ship.
15:36
The Moon: humanity’s first destination beyond our atmosphere.
14:28
Is our 3-D universe is just the inward projection of an infinitely distant boundary?
14:12
What if aliens are deliberately keeping quiet for fear that they might be destroyed?
