It's for a project, so please be accurate. Thankyou.
2007-01-15 07:27:46 · 3 answers · asked by twiggle512 2 in Science & Mathematics ➔ Astronomy & Space
None of the planets in the Solar System have retrograde orbit, but Venus and Uranus have retrograde rotation. Sometimes Uranus is said to have prograde rotation and a tilt of greater than 90 degrees, because it is believed to have been knocked around by a large collision. Venus, on the other hand, is believed to have developed retrograde rotation through solar tidal effects on its dense atmosphere.
2007-01-15 07:32:48 · answer #1 · answered by DavidK93 7 · 0⤊ 0⤋
That depends on what you mean by retrograde motion.
If you mean retrograde rotation, it's Venus and Uranus (and Pluto, but it's not a planet anymore).
If you mean a retrograde orbit, than none of them.
If you mean apparent retrograde motion as viewed from Earth (like when Mars goes into retrograde during opposition) then all of them do (not just the outer planets).
2007-01-15 08:00:22 · answer #2 · answered by kris 6 · 1⤊ 0⤋
All the planets outside earth's orbit can have retrograde motion as the earths orbit overtakes them. That would be anything from Mars out.
2007-01-15 07:40:40 · answer #3 · answered by Gene 7 · 0⤊ 2⤋