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.
From the launch of the Curiosity rover to a tour of Spaceport America and more, it was a busy week in space.
This cool space wallpaper of an artist's impression shows the distant dwarf planet Eris.
See images of Eris, the icy dwarf planet on the edge of the solar system.
The icy dwarf planet Eris is nearly exactly the same size as Pluto.
The photos show the ice giants blazing red-orange in infrared light.
Find out about the dwarf planet and what researchers think may be on its surface.The New Horizon spacecraft is en route to Pluto and carries one of the highest resolution interplanetary telescopes ever flown, the imagery promises to be tantalizing.
Was it Hurricane Irene from space, a black hole swallowing a star or something else?
The debate over Pluto's status shows that our understanding of the solar system is always evolving.
SPACE.com chats with Caltech planetary scientist Mike Brown, the man who "killed" Pluto.
Stern still thinks the decision to demote Pluto was a bad one.
NASA's New Horizons mission will transform our understanding of Pluto.
Five years ago, Pluto was demoted from planet to dwarf planet. What's the distinction?
The three worlds are likely dwarf planets, like Pluto and Eris.
No more shuttles, Pluto has a new moon, Mars rover gets a landing site and more. Vote for the top space story of the week.
Pluto's history is long and convoluted, packed full of drama and surprises.
The New Horizons probe is slated to make a close flyby of Pluto in July 2015.