Good ideas and conversation. No ads, no tracking. Login or Take a Tour!
elizabeth · 1961 days ago · link · · parent · post: Space fans of Hubski - Why don't moons ever have moons of their own?
Maybe moons are too small to have a big enough gravitational force? I know some big moons can have rings : https://en.wikipedia.org/wiki/Rings_of_Rhea How big does a rock that gravitates around a moon has to be, before it's called a "moon" ?
user-inactivated · 1958 days ago · link ·
This comment has been deleted.