Mimas plows along in its orbit, its pockmarked surface in crisp relief. The bright, steep walls of the enormous crater, Herschel 130 kilometers, or 80 miles wide, gleam in the sunlight
Mimas plows along in its orbit, its pockmarked surface in crisp relief. The bright, steep walls of the enormous crater, Herschel 130 kilometers, or 80 miles wide, gleam in the sunlight