this post was submitted on 24 Jan 2026
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Most of what is left after Jupiter is in Saturn and after that Neptune and Uranus take up a lot of the mass. The amount of mass in the small terrestrial planets, all of the moons, all of the asteroids etc. is less than 0.002% of the mass of the Solar system.
That's bananas. I knew the relative sizes were absurdly imbalanced, but no one has explained it in a way that I could imagine those differences. Thanks very much!