I'm not sure if this is common knowledge, but I just discovered that when you are on (or near) a planet surface when it is in the umbra of an eclipse, the usual artificial lightening that normally happens on the dark side of planets, does not kick in. It was kind of nice exploring in such darkeness. Even went into a large base that was spectacular in the dark, but unfortunately the base defenses surprised me and knocked my ship out before I got pics of it. But I did get some nice pics of the dark landscape . . .