> ## Content Index
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# How Astrophysics Can Literally Save the World
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/how-astrophysics-can-literally-save-the-world-mt7kak/
- Published: 2025-03-17T15:01:06.000Z
- Updated: 2025-08-21T13:47:27.000Z
- Description: How is it possible to tell if a space rock will one day collide with the Earth?
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 10, Episode 37, #ZZZ_Episode_4ac07eec-0d9d-45f1-b21e-45416eac731f, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

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?