Uranus’s axis is tipped over from axis of ecliptic, due seemingly to collision with a gas giant planetesimals. Where might such planetesimals be after 4.6B years, since Uranus has no large moon? Might one use IR telescope to detect motion of such comparatively nearby planetesimals? Such collisions, for similar orbits, must not be so uncommon for planetary systems, since at least two such collisions have occurred in our stellar system. In a simulation, if Jupiter and Neptune didn’t exist, might the aftermath of such collision result perhaps in a ‘hot Uranus’ near to sun?
November 8, 2012
Planetesimal collision with proto-Uranus
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