DO NOT PUBLISH YET - Pluto -- the Dwarf Planet Archive
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
19 November 2010, 03:20 PM ET
The astronomical community lost two longtime, eminent members this week when Brian Marsden and Allan Sandage passed away.
19 November 2010, 07:19 AM ET
Now that Pluto looks to have regained the title of largest object in the outer solar system, should astronomers consider calling it a full-fledged planet again?
19 November 2010, 07:19 AM ET
Mike Brown is best known as the man who killed Pluto. The Caltech astronomer led the team that discovered Eris, leading to Pluto's demotion to "dwarf planet."
15 November 2010, 05:01 PM ET
Pluto was originally considered the ninth planet in Earth’s solar system, but was recently classified as a dwarf planet. Pluto’s orbit takes it through the Kuiper Belt.
09 November 2010, 01:15 PM ET
The dwarf planet Eris, once thought to be the largest body in the outer solar system, may actually be smaller than Pluto, observations suggest.
27 October 2010, 11:20 PM ET
The dwarf planet Eris has been found to have a surface much like Pluto's and still harbors surprises five years after its discovery.
07 October 2010, 07:51 AM ET
The frozen surface of the dwarf planet Eris looks a lot like that of its smaller neighbor Pluto, new research has found.
16 June 2010, 07:04 AM ET
Stargazers can see the two brightest dwarf planets, formerly the asteroid Ceres and the planet Pluto, in June.
29 April 2010, 12:33 PM ET
Mysterious bright and dark spots mottling the surface of Pluto could be tar and frost, scientists say.