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Spzi ,

If you had a planet that was hollow in the center*, the entire hollow region would have zero gravity. You could have a thin-skinned planet with the entire interior an empty weightless void. I doubt any planets like this actually exist.

  • Assuming radial symmetry. If you can represent the planet as concentric spherical shells then you’re good.

I thought this was wrong, but it is true:

Brb fixing my other comments.

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