Astronomers have spotted a planet larger than Pluto in the far reaches of our solar system. Roughly three times farther away than Pluto, the new planet is the most distant known object in the solar system and the third brightest member of the Kuiper Belt. Near-infrared spectra show signs of methane ice on the planet's surface, indicating that it has not been warmed significantly since the birth of the solar system some 4.5 billion years ago. The discoverers have proposed a name for the new planet to the International Astronomical Union and are awaiting its decision.