One of the biggest "small details" that I absolutely love, and that probably not a lot of people get to see is that some bodies have seasonal atmospheres and coverings of fog/dust, and even fewer people will see the fog dissipate. I went to a moon of a moon of a gas giant out in the Formidine Rift a while back, and when the parent moon eclipsed the star, the child moon would get covered in really really thick fog. Then when the star came out from behind the parent moon, the fog would very quickly dissipate.
On approach I thought something was wrong with the rendering of the moon:
http://i.imgur.com/JAVBIAr.png
I quickly realised it was really thick fog:
http://i.imgur.com/yo5CPsI.png
So I flew around for about 20 minutes in almost zero visibility:
http://i.imgur.com/1MZo0Tx.png
Then the sun came out and the fog vanished:
http://i.imgur.com/AlmjqCz.png
Great pics, that's really cool.