
That's no moon...
It's clearly the back end of an Imperial Star Destroyer... Compare <a href="http://sci.esa.int/rosetta/54497-comet-67p-on-12-august-2014-navcam/">photo #6 from the article</a> with <a href="http://farm5.static.flickr.com/4122/4929759128_8282e59f48_z.jpg">a genuine photo of the space dreadnought</a>.
Before we attempt to rocket a probe into the derriere of the Sith, this coward wants to point out that he was never really down with the rebel scum anyway.