Mountains Mons Huygens Origin of the name Christiaan; Dutch astronomer, mathematician, physicist (1629-1695). When to observe it … Nearby Mons Ampère 30 km Huxley 49 km Montes Apenninus 82 km Mons Bradley 107 km Marco Polo 135 km Rima Conon 140 km Rima Bradley 144 km Conon 146 km