2007

• 6/14/2007 STScI-2007-24 1. Astronomers Measure Mass of Largest Dwarf Planet NASA's Hubble Space Telescope has teamed up with the W.M. Keck Observatory to precisely measure the mass of Eris, the largest member of a new class of dwarf planets... (More)

2006

• 4/11/2006 STScI-2006-16 2. Hubble Finds 'Tenth Planet' is Slightly Larger than Pluto NASA's Hubble Space Telescope has resolved the "tenth planet," nicknamed "Xena," for the first time and has found... (More)

2004

• 4/14/2004 STScI-2004-14 3. Hubble Observes Planetoid Sedna, Mystery Deepens Astronomers poring over 35 NASA Hubble Space Telescope images of the solar system's farthest known object, unofficially named Sedna, are surprised... (More)

2003

• 9/6/2003 STScI-2003-25 4. Farthest, Faintest Solar System Objects Found Beyond Neptune Astronomers using NASA's Hubble Space Telescope have discovered three of the faintest and smallest objects ever detected beyond Neptune. (More)

2002

• 10/7/2002 STScI-2002-17 5. Hubble Spots an Icy World Far Beyond Pluto NASA's Hubble Space Telescope has measured the largest object discovered in the solar system since the discovery of Pluto 72 years ago. Approximately... (More)
• 4/17/2002 STScI-2002-04 6. Hubble Hunts Down Binary Objects at the Fringe of Our Solar System The Hubble Space Telescope is hot on the trail of a puzzling new class of solar system object that might be called a Pluto "mini-me."... (More)

2000

• 9/14/2000 STScI-2000-31 7. Centaur's Bright Surface Spot Could be Crater of Fresh Ice The unexpectedly varied surface of a wayward piece of space debris has given astronomers new insights into the characteristics and behavior of a ghostly... (More)

1995

• 6/14/1995 STScI-1995-26 8. Hubble Identifies a Long-Sought Population of Comets Beyond Neptune The Hubble telescope has detected a long-sought population of comets dwelling at the icy fringe of the solar system. The observation, which is the astronomical... (More)