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Moonmoons, Gravitons, and More!

StarTalk Radio

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Kenamoon Have a Moon?

The first moon has to be far enough away from the main planet so that it doesn't have orbital allegiance problems. We think the solar system started with at least 30 planets when it originally formed. And it was just a jockeying force stable orbits. So there you go. What you all do for your moon, some other planets gravity will take it off. Just better remember that.

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