Kahdeksan planeettaa

Niin hauskaa kuin se olisikin ollut, on meillä enää kahdeksan planeettaa. Pluto määriteltiin kääpiöplaneetaksi: Today, astronomers at the International Astronomical Union's General Assembly in Prague decided that the Solar System has eight planets, and Pluto is not one of them. Pluto has been declared a "dwarf planet." Joining Pluto in the dwarf planet category are giant asteroid Ceres and Pluto's cousin 2003 UB313. Get the full story at http://spaceweather.com/ .

http://cc.joensuu.fi/~jeholopa/Sanasto/aurinkokunta.htm