Venus and Neptune are the only round objects that are rotating in different directions in our solar systems. The angular momentum of the proto-planetary disc is preserved in all the bodies with enough mass to preserve said angular momentum following a collision. So every solar system has an inherently “up” and “down” to it’s planetary disc with nearly all the major bodies in said system rotating in a similar fashion.
Not every planet spins in the same direction
Venus and Neptune are the only round objects that are rotating in different directions in our solar systems. The angular momentum of the proto-planetary disc is preserved in all the bodies with enough mass to preserve said angular momentum following a collision. So every solar system has an inherently “up” and “down” to it’s planetary disc with nearly all the major bodies in said system rotating in a similar fashion.