I have seen it many time as a fakey 3d animation, but this one is real. It was take by the The Deep Impact spacecraft which now is onto some new mission. But at 13 million miles away, it turned its camera towards the Earth to take some family photos, and got the moon passing in front of it. Very cool.
Via: http://blogs.discovermagazine.com/badastronomy/2008/07/17/holy-frak-moon-transits-earth/
