出典:Wikipedia
出典:『Wikipedia』 (2011/07/01 23:15 UTC 版)
Tempel 1 (official designation: 9P/Tempel), is a periodic comet discovered by Wilhelm Tempel in 1867. It currently completes an orbit of the Sun every 5.5 years. Tempel 1 was the target of the Deep Impact space mission, which photographed a deliberate high-speed impact upon the comet in 2005. It was re-visited by the Stardust spacecraft on February 15, 2011.