出典:Wikipedia
出典:『Wikipedia』 (2011/04/25 14:59 UTC 版)
WASP-12b is an extrasolar planet orbiting the star WASP-12, discovered by the SuperWASP planetary transit survey. Its discovery was announced on April 1, 2008. Due to its extremely close orbit to its star, it has one of the lowest densities for exoplanets ('inflated' by the flux of energy from the star). The planet takes only a little over a day to orbit the star, in contrast to 365 days for the Earth to orbit the Sun. Its distance from the star is only 1/44 the Earth’s distance from the Sun with the eccentricity the same as Jupiter.