出典:Wikipedia
出典:『Wikipedia』 (2011/06/25 21:30 UTC 版)
Planet V is a hypothetical fifth planet posited by NASA scientists John Chambers and Jack Lissauer to have once existed between Mars and the asteroid belt, based on computer simulations. Chambers and Lissauer presented this idea during the 33rd Lunar and Planetary Science Conference, held from March 11 through 15, 2002.