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Muhabba t1_je57tyl wrote

Why is the solar system on such a flat plane? Shouldn't it be more of a sphere with the sun in the middle?

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mfb- t1_je5bjqa wrote

That's the natural arrangement of a system with non-zero angular momentum where objects collide with each over time: A disk is the configuration you get after everything not in the disk collided with other particles. Planetary rings are pretty flat for the same reason: Here is a video explaining the concept.

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