In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the criteria and was demoted to a dwarf planet. Things have been a bit of a mess ...

A team of scientists wants Pluto classified as a planet again — along with dozens of similar bodies in the solar system and any found around distant stars. The call goes against a controversial ...

The year was 2015. After traveling billions and billions of miles through the Erebus, New Horizons encounters the boatman, and the somber lord of the departed. The spacecraft could have been called ...

PRAGUE, Czech Republic — Leading astronomers declared today that Pluto is no longer a planet under historic new guidelines that downsize the solar system from nine planets to eight. After a tumultuous ...

Dave is a veteran game newswriter and has reported for a variety of outlets for over a decade, writing news, reviews, guides and more for online game sites wherever he can find them. An intrepid No ...

Pluto the planet is dead. The baby in the solar system's familiar nine-planet pantheon, a favorite of schoolchildren everywhere, was disowned yesterday by the world's astronomers. Pluto's failing? It ...

NASA has released a new video showing what it might be like to land on Pluto with a brand-new view of the dwarf planet's surface. The space agency's New Horizons spacecraft spent about six weeks in a ...