出典:Wikipedia
出典:『Wikipedia』 (2011/06/22 20:50 UTC 版)
The Ranger program was a series of unmanned space missions by the United States in the 1960s whose objective was to obtain the first close-up images of the surface of the Moon. The Ranger spacecraft were designed to take images of the lunar surface, returning those images until they were destroyed upon impact. A series of mishaps, however, led to the failure of the first six flights beginning in 1961 until Ranger 7 successfully returned images in July 1964, followed by two more successful missions.