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 ...

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

Today will be a day of professional focus and opportunities, with heightened instincts and a chance to reflect on career and ...

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 ...

From afar, Pluto once seemed boring and dead. After all, the dwarf planet is only two-thirds the size of our moon and resides more than 30 times farther out from the sun than does Earth.

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

Although Seeing in the Dark doesn't directly discuss Pluto, it does celebrate the joy of observing planets. Viewers who watch the show may wonder what happened to Pluto in 2006 and whether any of ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

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 ...