The strange blend of surface chemistry on Nix and Hydra raises big question about the evolution of the Pluto system.

Pluto is too far away from Earth to be seen with the naked eye. If you stood on Pluto's surface, the Sun would merely appear to be a very bright star. Although previous images showed that ...

An 11-inch scope will reveal Pluto and a few similarly faint stars, but a larger instrument will improve your odds a lot.

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One year on the distant ice planet is 248 Earth years, and one day is 153 ...

and the dark and dangerous heart that beats below the veneer of civilization and the crust of the Earth itself. Sunny stuff, it ain’t. Petit but potent, Pluto was discovered in 1930. Pluto’s ...

New exhibit to replace Greenbelt Planet Walk with a new trail through Julia Davis Park — but this time, with one less member ...

In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...

New Horizons rocketed past the Pluto system in 2015, which is now technically considered part of the Kuiper Belt. The mission collected data on the dwarf planet and its unique moon, Charon.

This year, Pluto was in Aquarius from January 20 through September 1. Pluto then went retrograde back into Capricorn again.

So, when Pluto entered this Earth sign in 2008, the world was plunged into a period of upheaval that dismantled outdated systems, forcing collective introspection around power, responsibility and ...