knapplc wrote:Saturn on the sun side, Neptune on the outer space side.
Not really, he didn't answer the question. Only one planet can be the closest planet to Uranus and that planet is Saturn!
Boo Yah!!!! Can you feel that? Huh, can you? Can you?
Well, if we wanted to be especially technical we'd have to figure out where they are in their orbits at any particular time. If we looked at a top-down view of the solar system, and Saturn and Neptune were both on the "right" side of the sun and Jupiter and Uranus were on the "left" side, Jupiter would be closer by several hundred million miles.
Oribital period really has to be taken into account in these questions, as does angle to the Plane of the Ecliptic.