... Aristarchus lived on the Greek island of Samos, a small island in the center of the above picture that can be identified with a good map. Southwest Mercury . ... The planet Mercury resembles a moon. Mercury's old surface is heavily cratered like many moons. ... Mercury: A Cratered Inferno . ... Mercury's surface looks similar to our Moon's. Each is heavily cratered and made of rock. ... In the Center of Spiral M77 . ... What is happening in the center of nearby spiral galaxy M77? ...