Lately have been using this image as my desktop background:

It is an image I took with Celestia two years ago and, coming across again, seemed like good background material.
The main object in the foreground is of course Europa, mostly eclipsing Jupiter in the background. To the left is the Sun, and to the left of that another disk is visible. I recreated this shot in Celestia recently to verify (the time displayed in the image is local to Sydney, so I had to adjust the clock settings in Celestia to get to the right moment, but if you leave them unaltered and enter the time shown you get a shot which is nearly a mirror image of this one) that the other disk visible is indeed Io and not one of the other Galilean moons.
I think it is wonderful that there are places in the solar system we could go and see more than two objects visible in the sky as more than points.
It is an image I took with Celestia two years ago and, coming across again, seemed like good background material.
The main object in the foreground is of course Europa, mostly eclipsing Jupiter in the background. To the left is the Sun, and to the left of that another disk is visible. I recreated this shot in Celestia recently to verify (the time displayed in the image is local to Sydney, so I had to adjust the clock settings in Celestia to get to the right moment, but if you leave them unaltered and enter the time shown you get a shot which is nearly a mirror image of this one) that the other disk visible is indeed Io and not one of the other Galilean moons.
I think it is wonderful that there are places in the solar system we could go and see more than two objects visible in the sky as more than points.