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Dwarf Planet Formerly Known As Xena Officially Named 'Eris'
September 14, 2006 — The International Astronomical Union has announced that the dwarf planet known as Xena since its 2005 discovery has been named Eris, after the Greek goddess of discord. Eris's moon will be known as ... > full story -
Pluto Downgraded To 'Dwarf Planet' Status; Solar System Now Has Eight Planets
August 25, 2006 — The International Astronomical Union (IAU) has downgraded the status of Pluto to that of a "dwarf planet," a designation that will also be applied to the spherical body discovered last year by ... > full story -
Bigger Solar System? Astronomers Debate Definition Of 'Planet' And 'Plutons'
August 16, 2006 — The world's astronomers, under the auspices of the International Astronomical Union (IAU), have concluded two years of work defining the difference between "planets" and the smaller "solar system ... > full story -
New Capture Scenario Explains Origin Of Neptune's Oddball Moon Triton
May 11, 2006 — Triton, unique among all the large moons in the solar system because it orbits Neptune in a direction opposite to the planet's rotation, may have abandoned an earlier partner to arrive in its unusual ... > full story -
Hubble Finds 'Tenth Planet' Is Slightly Larger Than Pluto
April 17, 2006 — NASA's Hubble Space Telescope has resolved the "tenth planet," nicknamed "Xena," for the first time and has found that it is only just a little larger than Pluto. Though previous ground-based ... > full story -
Researchers Describe Discovery Of Pluto's New Moons
February 23, 2006 — Researchers at the Johns Hopkins University Applied Physics Laboratory and the Southwest Research Institute describe the discovery of two new moons around Pluto -- a finding that made the ninth ... > full story -
NASA's Spitzer Uncovers Hints Of Mega Solar Systems
February 8, 2006 — NASA's Spitzer Space Telescope has identified two huge "hypergiant" stars circled by monstrous disks of what might be planet-forming dust. The findings surprised astronomers because stars as big as ... > full story -
Kuiper Belt Moons Are Starting To Seem Typical
January 11, 2006 — In the not-too-distant past, the planet Pluto was thought to be an odd bird in the outer reaches of the solar system because it has a moon, Charon, that was formed much like Earth's own moon was ... > full story -
Measuring Charon: Astronomers Seize Rare Opportunity
January 5, 2006 — Being in the right place at the right time gave a group of Massachusetts research astronomers a unique opportunity to study Pluto's largest moon Charon. The resulting measurements, to unprecedented ... > full story -
University Of Colorado Student-Built Instrument Set To Launch On Pluto Mission
December 28, 2005 — The University of Colorado at Boulder's long heritage with NASA planetary missions will continue Jan. 17 with the launch of a student space dust instrument on the New Horizons Mission to Pluto from ... > full story
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