PBS Space Time

Will the Universe Expand Forever?

Throughout history, there has been much speculation about what the fate of the universe would be. Many theorized that the universe would eventually succumb to the pull of gravity, and reverse its expansion in what was being called ‘The Big Crunch.’ However, with the help of mathematical equations from Newton, Einstein, and Alexander Friedmann, we now have an answer.

Will the Universe Expand Forever?

9m 51s

  • Why Didn’t Antimatter Destroy The Universe?: asset-mezzanine-16x9

    Why Didn’t Antimatter Destroy The Universe?

    S11 E2 - 14m 50s

    At one-one-thousandth of a second after the Big Bang, the great annihilation event should have wiped out all matter, leaving a universe of only radiation. Why still don't know why any matter survived. Well, a new finding from the LHC brings us one step closer to understanding why there's something rather than nothing.

  • New Evidence: Earth Had Rings (and Might Regain Them): asset-mezzanine-16x9

    New Evidence: Earth Had Rings (and Might Regain Them)

    S11 E1 - 16m 30s

    There’s an extremely good chance that Earth once did have a ring system. At least, that’s the proposal by a recent study that has evidence that a mysterious burst in meteor activity nearly half a billion years ago was actually caused by that ancient ring system collapsing onto the Earth. And, you know, if we had a ring once maybe we can have one again.

  • How Astrophysics Can Literally Save the World: asset-mezzanine-16x9

    How Astrophysics Can Literally Save the World

    S10 E37 - 17m 23s

    Giant space rocks are definitely going to hit the Earth again. We actually do know how to deflect them, but only if we find them and correctly assess their risk. But the solar system is a chaotic place. How is it even possible to tell if a space rock will one day collide with the Earth?

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