vineri, 30 ianuarie 2009

New Scientist: The mystery of Planet X

TWO years ago the solar system lost a planet. Pluto was deemed too insignificant to rank alongside Mars, Jupiter and the rest, and was demoted to dwarf planet status. Pluto's fall from favour left us with only eight bona fide planets. But what the solar system has lost, Patryk Lykawka now hopes to replace.
Lykawka, an astronomer at Kobe University in Japan, suspects a ninth planet as large as Earth is hiding beyond Pluto. So far, this frigid "super-Pluto" has escaped detection. But not for much longer, Lykawka hopes. "Within five years or so, we will know for sure if it exists." Full story: