Could someone explain how orbits are so flat? For example, why do most of the planets orbit on the same plane instead of randomly? Why are galaxies flat instead of spherical? Gravity forms matter into a ball (planets, stars, etc..) so why not orbits?
In: Physics
Around 2:20 to 3:10ish
They do, they’re just not as likely to stay clear of collisions if they’re not in flat same-directional orbits. The Universe has had a very long time to eliminate the orbits even slightly less likely to make it.
At least, that’s how it was explained to me when I asked the same question ~20 years ago, I don’t know how accurate it is.
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