Why is it that Mercury and Venus have no moons while all the rest including Pluto do?
Urwumpe “stole” my answer, but it’s all good, because he worded it better than I would have. But yes, I suspect the gravity of the sun plays a huge role. As that “other” answerer stated, it is very likely that none of the inner / terrestrial planets developed moons from just the masses of those moons forming at the same distance as the planets, and eventually became natural satellites, because of the sun “gobbling up” most of the available matter. The outer planets, (A) being more massive and (B) being farther away from the sun’s mass (hence, less gravity from our big shining solar mass), it is more likely for there to be more “non-sun” matter to coalesce into bodies farther from the sun. The conditions of earth and Mars having moons, are most likely much different than the conditions of the outer planets having moons. I also suspect, even if at some point Mercury did have a moon, it’s relative “feeble” mass in comparison to it’s gargantuan neighbor (the sun) would mean its satellite w
