Why do planets orbit at the same level as each other?

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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!

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Anonymous 0 Comments

Because they all coalesced over time out of the same spinning disc of matter. It mostly collapsed to the middle and formed the sun, but clumps out in the disc collapsed into the planets. But it’s all the same disc of matter still spinning.

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