出典:Wikipedia
出典:『Wikipedia』 (2011/05/04 21:04 UTC 版)
In astronomy, minimum mass is the lower-bound calculated mass of observed objects such as planets, stars and binary systems, nebulae, and black holes. Minimum mass is a widely cited statistic for extrasolar planets. Because most extrasolar planets are currently detected by the radial velocity method, which reveals planets by measuring changes in the movement of stars in the line-of-sight, the real orbital inclinations and true masses of the planets are generally unknown.