It sounds like it was a matter of using consistent units to describe distance or force between two separate NASA institutions. I heard there was rings around Jupiter. There are rings around Jupiter ,Saturn, Uranus and Neptune. The Jovian ring system is pretty sparse and doesnt have nearly as many 'rocks' in it as Saturns. White surfaces and silvered ones reflect heat.
Black ones absorb heat.
Also, excess heat can be 'ejected' from inside a spacecraft through radiators ,which are not much different than what you have inside your car. The radiators have large surfaces exposed to space and emit infrared 'heat' radiation extracted from inside the spacecraft, usually through some kind of fluid heat-exchanger. My class is doing a paper on the phases of Mars. Phase 1, Red Phase. Phase 2, Green Phase.