It must have cleared all other celestial bodies, except its own moons, from its orbit.

Pluto may have been downgraded from full-planet status, but that doesn't mean it doesn't hold a special place in scientist's ...

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

(astronomy), (astrology) A symbol for the dwarf planet Pluto. Synonym: ⯓ (astronomy), (astrology) A symbol for the dwarf planet Pluto. Synonyms: ♇, ⯕, ⯔ and ⯖ ...

Charon| NASA's New Horizons captured this high-resolution enhanced color view of Charon just before the spacecraft made its closest approach to Pluto on July 14, 2015. The changing faces of Pluto ...

Famously, Pluto no longer met the criteria and was demoted to a dwarf planet. Things have been a bit of a mess since then — so is it time to redefine the planet? Astronomers were comfortable ...

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 ...

Famously, Pluto no longer met the criteria and was demoted to a dwarf planet. Things have been a bit of a mess since then — so is it time to redefine the planet? To be fair, Pluto had it coming.

The possibility of life beyond Earth has filled our imaginations and been a driving force behind space exploration for ...

The new season's forecast is frightening, and we should all take a cue from Sagittarius on how to respond. Read our queer ...

After a year and a half of moving back and forth between Capricorn and Aquarius, Pluto makes its final entrance into boundary ...