system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come everything in our universe is all on the same plane/axis along with clockwise orbits. Shouldn't there be planets that orbit our sun perpendicular to the earth's orbit?

The milky way,  other galaxy's.  They are all planar.... why?
gpt
As for the reason that the solar system is flat:

The solar system formed from a big cloud of dust and gas, which was rotating.  As gravity pulled that cloud together, and a nice, not burning lump formed at the middle, pieces started colliding, and coalescing, but they never lost the angular momentum they had from when it was just a big spinning cloud.  The vertical momentum is negated by collisions, but the angular momentum is conserved.