I feel like the gravity here would be pulling me all over the place
Both planets look great, I don't often see Neptune-like ones. But as usual your Earth-like ones are always the best
Is that dark rectangle supposed to be there on the landscape
Looks like it is because I think I see an astronaut near it
But in case it was a render error I thought I'd mention anyway. I think a weaker secondary light source in blue coming from the other way (and influencing only the terrain, not the planets) would be a good way of giving the impression of blue light reflecting off both planets onto the scene too
It does look very realistic as is, but some blue light on some areas will help it "belong" to the rest of the scene more.