First a planet, then it's not: Pluto is the only planet to get kicked out of the solar system club. Just seven months after New Horizons rocketed away from Cape Canaveral, Florida, the ...

One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

However, some scientists argue that Pluto should be considered a planet based on geological activity rather than orbital mechanics. NASA’s New Horizons mission revealed ice mountains ...

During its initial journey to Pluto, New Horizons collected baseline data about Lyman-alpha emissions using the Alice instrument, an SwRI-developed ultraviolet spectrograph. A spectrograph is a ...

Legendary actor William Shatner wants President Trump to restore Pluto to greatness as scientists claim to have found a “new” ninth planet. “So there’s a 10th planet that was found in our ...

The International Astronomical Union, which reclassified Pluto as a dwarf planet in 2006, is the arbiter of such ...

During its initial journey to Pluto, New Horizons collected baseline data about Lyman-alpha emissions using the Alice instrument, an SwRI-developed ultraviolet spectrograph. A spectrograph is a ...

However, some scientists argue that Pluto should be considered a planet based on geological activity rather than orbital mechanics. NASA’s New Horizons mission revealed ice mountains, glaciers and ...