DO NOT PUBLISH YET - Pluto -- the Dwarf Planet Archive
11 July 2012, 12:12 PM ET
Using the Hubble Space Telescope, astronomers have discovered a fifth moon orbiting the dwarf planet.
11 July 2012, 11:34 AM ET
See how much you know about the dwarf planet Pluto and its natural satellites.
11 July 2012, 10:56 AM ET
Should Pluto be classified as a dwarf planet or a full-fledged world?
11 July 2012, 10:25 AM ET
The Hubble Space Telescope has found another moon orbiting Pluto, bringing its total to five moons.
11 July 2012, 10:20 AM ET
Learn all about Pluto's weirdly eccentric orbit, four moons and more in this infographic.
06 April 2012, 10:46 AM ET
A looming shortage of the radioactive isotope worries many planetary scientists.
22 February 2012, 12:33 PM ET
NASA's New Horizons Pluto mission team is hoping for 100,000 signatures by March 13.
01 February 2012, 04:36 PM ET
The petition hopes to collect 100,000 signatures by March 13.
19 January 2012, 01:35 PM ET
New Horizons is zooming toward a close encounter with Pluto in 2015.
21 December 2011, 07:00 AM ET
NASA's Hubble Space Telescope made the find.
20 December 2011, 08:00 AM ET
Here are some of the most significant astronomical findings of the year.
20 December 2011, 07:00 AM ET
The past year saw incredible gains in science and astronomy. Here are some of the best finds of 2011.
03 December 2011, 03:02 AM ET
From the launch of the Curiosity rover to a tour of Spaceport America and more, it was a busy week in space.
26 October 2011, 06:06 PM ET
This cool space wallpaper of an artist's impression shows the distant dwarf planet Eris.
26 October 2011, 02:15 PM ET
See images of Eris, the icy dwarf planet on the edge of the solar system.
26 October 2011, 02:00 PM ET
A brief tour of the five currently recognized dwarf planets, from Ceres to Eris.
26 October 2011, 01:16 PM ET
The icy dwarf planet Eris is nearly exactly the same size as Pluto.
26 September 2011, 04:32 PM ET
The photos show the ice giants blazing red-orange in infrared light.
02 September 2011, 06:16 PM ET
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.
28 August 2011, 09:00 AM ET
Was it Hurricane Irene from space, a black hole swallowing a star or something else?
24 August 2011, 12:00 AM ET
The debate over Pluto's status shows that our understanding of the solar system is always evolving.
24 August 2011, 12:00 AM ET chats with Caltech planetary scientist Mike Brown, the man who "killed" Pluto.
24 August 2011, 12:00 AM ET
Stern still thinks the decision to demote Pluto was a bad one.
23 August 2011, 01:30 PM ET
NASA's New Horizons mission will transform our understanding of Pluto.
23 August 2011, 07:00 AM ET
Five years ago, Pluto was demoted from planet to dwarf planet. What's the distinction?
22 August 2011, 06:00 AM ET
A brief tour of the five currently recognized dwarf planets, from Ceres to Eris.
03 August 2011, 05:47 PM ET
The three worlds are likely dwarf planets, like Pluto and Eris.
22 July 2011, 03:44 PM ET
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.
21 July 2011, 02:51 PM ET
Pluto's history is long and convoluted, packed full of drama and surprises.
20 July 2011, 04:45 PM ET
The New Horizons probe is slated to make a close flyby of Pluto in July 2015.
20 July 2011, 09:35 AM ET
The Hubble Space Telescope has discovered a tiny new moon around Pluto.
20 June 2011, 07:58 PM ET
It has been five years since Nix and Hydra, Pluto's tiny moons, were named. Mysteries still abound with the pair.
19 April 2011, 03:35 PM ET
Poisonous gas has been discovered in the atmosphere of the dwarf planet Pluto.
18 March 2011, 04:45 PM ET
NASA's New Horizons probe has reached the orbit of Uranus on its way to Pluto.
16 December 2010, 01:53 PM ET
A NASA Pluto probe may be slumbering at the moment, but it's still tearing through space at a blistering pace, closing in on the orbit of Uranus.
29 November 2010, 07:13 AM ET
Planetary scientist Alan Stern has been fighting for Pluto's planethood ever since the icy body was demoted to "dwarf planet" in 2006. He lays out the case for Pluto at