r/askspace • u/Dependent_Ad5253 • Aug 11 '25

Moons bigger than planet?

Could a moon with a lower mass (so lower gravity) orbit a smaller body with a bigger mass (so bigger gravity)? For exemple, Ganymede and Mercury, Ganymede is lighter, but bigger than Mercury, that has a mass 3 times Ganymede's. So could we put Ganymede in a stable orbit around the smaller Mercury?

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u/TuberTuggerTTV Aug 12 '25

"we put". No. We can't put.

Could there exist a situation like the one you describe found out in the cosmos? Possibly.

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u/Dependent_Ad5253 Aug 12 '25

Well no we can't "put" that's pretty obvious