A few days ago the Astronomy Pic of the Day gave us this one. I didn't know they re-used pics; I don't, as far as I know!
Because I'd seen and saved this one about a year ago, and then I wound up not using it. I always feel differently about things in the queue, but when I saw it again, I felt like I screwed up not posting it. This is really cool.
It's Jupiter and one of its moons, Io. And how detailed; it's like the earth as beauty concept. The little shadow of the little perfect marble against the big marble.
There is something remarkable about the earth as art and about this sort of thing, because not only is it beauty, it's a remarkable kind of beauty that you can think about on many different levels.
There is a shot of Io alone in the IotD archives in which I note that it's the same size as Earth's moon. That gives some perspective on the above.