I wonder how many planets have been borrowed from other passing stars.
Ever read When Worlds Collide, and After World’s Collide?
Very good Sci-fi even though written in the early 1930’s..........
I would suggest Pluto as a “borrowed” body as it so far out of the plane of the ecliptic.
Uranus with it’s radically different, “rolling” axis might have been altered by a close encounter with a passing extrasolar body—perhaps from another system.
The Asteroid Belt speaks to something catastrophic happening in that orbital space. A collision from an extra solar body? Torn apart by forces within our own system while it developed?
Venus’ planetary rotation spins “clockwise” while earth (and the rest of the planets) spin “counter-clockwise.” Can’t recall why it does that. Might have to do with its extremely thick atmosphere.
The more we learn about our own solar system, the more amazed I am by it!
We’ve got a keyword, “rogueplanets” (or maybe no ‘s’ on the end, or maybe both) about planets sans stars. I’d post it, but a five topic link post in #3 was deleted for no reason at all.