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"Death Star" Moon
Saturn's 200 km-diameter moon Mimas, also known as the "Death Star" satellite because of its distinctive impact crater, is about as massive as Saturn's rings. During its approach to Mimas on Aug. 2, 2005, the Cassini spacecraft narrow-angle camera obtained multi-spectral views of the moon from a range of 228,000 kilometers (142,500 miles). Impact craters made by the infall of cosmic debris are shown; the largest is more than 100 kilometers (62 miles) in diameter and displays a prominent central peak. The smaller craters are abundant and indicate an ancient age for Mima's surface.