system
Given the following post, respond as if you're commenting on Reddit:
human
Why does it seem that all planets around a sun are on a 2-dimensional plane? Can they be 3-dimensional?

If you look at any picture of our solar system, every planet is is on a flat plane extending out from the general center of the sun. Why is that? and can some planets go "above" and "below" the sun as an orbit?
gpt
because all the planets were formed out of the same disc that our star did. as the "cloud" of matter rotates, centrifugal forces flatten the cloud into a disc shape, then as matter clumps together, it continues to rotate in this disc getting bigger and bigger, until it forms an asteroid, a planet, or our sun.