Mercury from Messenger
Mercury, looks quite like the moon. A lot like the moon actually, but it is larger, denser, and more massive and has twice the gravity of the Moon. What I am truly interested in is the fact that we made a satellite so resistant to heat that it could get all the way to Mercury and not burn up. Without an atmosphere, planets really get pummeled. These craters have these awesome blue shades coming out of them and brown patches, and it makes me wonder what it truly is. The large crater at the upper left hand corner is actually 50 miles wide. Holy ridiculousness Batman, a 50 mile wide crater. I guess the sun's effect on comets really affords this planet a beating. Awesome planet, awesome APOD.