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Moonmoons, Gravitons, and More!

StarTalk Radio

Star Wars, Episode 4: The Great Hope or the Hope Diamond?

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Most stars in the night sky, when you take a telescope to them, we'll reveal more than one star in mutual orbit. It turns out planetary orbits are not particularly stable under those conditions. And so you can get chaotic orbits and even unstable orbits and they'll fly away. But it is possible to have two stars orbiting so close together that there's a smeared common gravity between the two planets. So that planet he was on can sustain a stable orbit around it. And you can evolve life and have everything that you would want and need. That is the only correct science in all Star Wars movies combined.

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