Pluto sits nearly 3.7 billion miles from Earth — so far that sunlight takes up to 6 hours to reach it. A spacecraft traveling ...

The discovery of another moon around Pluto is exciting news for planetary science, but it's also likely causing some anxiety for the team in charge of New Horizons, a spacecraft set to be the first ...

Debate has raged for two decades over whether Pluto should be considered a planet. Some want President Trump to take action ...

Scientists decided one way, but some states still see Pluto as a planet. So I asked the next generation their opinion.

Add Yahoo as a preferred source to see more of our stories on Google. Guests visting the Lowell Observatory in Flagstaff, Arizona during the I Heart Pluto Festival gaze at celestial objects from the ...

Known as Planet X ahead of its discovery, Pluto has five moons, namely, Charon, Styx, Nix, Kerberos, and Hydra. The name Pluto was suggested by an eleven-year school girl Venetia Burney from Oxford in ...

After a 10-year-old wrote to NASA begging for Pluto to be re-instated as a planet, Administrator Jared Isaacman appears to be ...