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.
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.