Latest Discoveries About Pluto, the Dwarf Planet
Pluto, originally considered the ninth planet, was recently classified as a dwarf planet and is the least massive planet in the solar system.
See images and illustrations of the dwarf planet Pluto and its three — now FIVE! — moons.
Dwarf planet Pluto has one giant moon, Charon, but now is known to have four more tiny satellites.
Using the Hubble Space Telescope, astronomers have discovered a fifth moon orbiting the dwarf planet.
See how much you know about the dwarf planet Pluto and its natural satellites.
See photos from NASA's New Horizons mission to explore the dwarf planet Pluto.
Should Pluto be classified as a dwarf planet or a full-fledged world?
The Hubble Space Telescope has found another moon orbiting Pluto, bringing its total to five moons.
Learn all about Pluto's weirdly eccentric orbit, four moons and more in this SPACE.com infographic.
A looming shortage of the radioactive isotope worries many planetary scientists.
NASA's New Horizons Pluto mission team is hoping for 100,000 signatures by March 13.
The petition hopes to collect 100,000 signatures by March 13.
New Horizons is zooming toward a close encounter with Pluto in 2015.
Here are some of the most significant astronomical findings of the year.
The past year saw incredible gains in science and astronomy. Here are some of the best finds of 2011.