No more pussyfooting around. It's official: Pluto has 14 new place names. Most we suspected would be there, but a few are new. Pluto's "heart" now bears the name of American astronomer Clyde Tombaugh, ...

Not much to name in our current view of Pluto (left). That will all change during the July flyby when New Horizons will image features down to 1 mile (1.6 km) across. Credit: NASA Here's your chance ...

CAPE CANAVERAL, Fla. -- Pluto is considered a planetary oddball -- a tiny, frozen world so unlike the other planets that some astronomers doubt whether it even deserves to be called a planet.

WASHINGTON (Reuters) - A dwarf planet orbiting beyond Neptune has been designated the third plutoid in the solar system and given the name Makemake, the International Astronomical Union said on ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

Chemists of the Manhattan Project were having mythology trouble. They had created two new elements, Nos. 95 and 96 (TIME, Nov. 26). But when they tried to name them, they were stumped. Uranium (No. 92 ...