My question is which of the outer planets you could see with the naked eye if you were in close proximity to them. It's pretty obvious the human eye can see the inner planets through to Mars, but I know that space probes to the outer planets need sensors designed for extremely low light conditions, and the pictures we see are often enhanced to make them brighter than they would actually appear. So:
- Could you tell if a planet was there against the blackness of space?
- Could you see details?