Search PBS Space Time


2021-06-09: Are We Running Out of Space Above Earth?

  • 14:43: The gravitational interaction is weak except right next to the relic - on the scale of Planck lenfths.

2018-11-21: 'Oumuamua Is Not Aliens

  • 09:22: ... from our own Oort cloud and was socked from its orbit by impact and or gravitational interaction into a trajectory that will send it to the ...

2018-11-07: Why String Theory is Right

  • 03:55: But in very strong gravitational interactions, that intersection itself becomes more and more point like.
  • 04:15: If you even try to describe very strong gravitational interactions, you get nonsense black holes in the math.

2018-10-18: What are the Strings in String Theory?

  • 09:10: ... you remember from our episode on quantum gravity, if you try to describe gravitational interactions on the smaller scales, the energies required to interact on that scale ...

2018-03-28: The Andromeda-Milky Way Collision

  • 05:06: They used simulations of the gravitational interactions of millions of particles representing groups of stars and dark matter.
  • 06:09: Gravitational interactions with stars slingshots those stars into larger orbits or even completely out of the galaxy.

2017-10-04: When Quasars Collide STJC

  • 07:30: Basically, the black holes slingshot stars outwards through gravitational interactions.
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