I just stumbled across this picture of the small Martian moon Phobos taken by the ESA’s Mars Express spacecraft.
![phoboslimb_marsexpress](http://nightskyonline.info/wp-content/uploads/2011/01/phoboslimb_marsexpress-300x200.jpg)
Pictures of Phobos aren’t unusual. What impressed me with the picture was having Mars in the background. A larger version of the picture can be found here on the Astronomy Picture of the Day website.