出典:Wikipedia
出典:『Wikipedia』 (2011/05/02 05:40 UTC 版)
Ridge A is a site in Antarctica that was identified in 2009 as the best suited location on the surface of Earth for astronomical research. The site, approximately 1,000 kilometres (620 mi) from the South Pole and 144 kilometres (89 mi) southeast of Dome A, is situated in a portion of the Australian Antarctic Territory.