By that, I mean, why do planets always orbit… horizontally(?) around the sun. Why not vertically? Space is a 3D space, I’d course. So why would the planets not end up going up as well as sideways?
Edit: Space science is a lot more complicated than I thought, and I am here for this rabbit hole. Ty everyone for your answers so far!
In: 2352
The planets come from the same stuff.
Before there were planets there was a big spinning soup of stuff around the young sun.
All the stuff that would later become the planets was in this big, very fast spinning soup disc.
Because we were all spinning in the same soup, it all flattened on the same plane, then gravity made stuff congeal into planets.
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