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Fifth Dwarf Planet Named Haumea
September 18, 2008 — The International Astronomical Union has announced that the object previously known as 2003 EL61 is to be classified as the fifth dwarf planet in the Solar System and named Haumea. This now means ... > full story -
'Plutoid' Chosen As Name For Solar System Objects Like Pluto
June 11, 2008 — The International Astronomical Union has decided on the term plutoid as a name for dwarf planets like Pluto at a meeting of its Executive Committee in Oslo. Almost two years after the IAU General ... > full story -
Dwarf Planet Eris Is More Massive Than Pluto
June 17, 2007 — Aptly named after the Greek goddess of conflict, the icy dwarf planet, Eris, has rattled the general model of our solar system. The object was discovered by astronomer Mike Brown of Caltech in the ... > full story -
Mission Could Seek Out Spock's Home Planet
May 11, 2007 — Science fiction may soon become science fact. Astronomers at NASA's Jet Propulsion Laboratory have recently concluded that the upcoming planet-finding mission, SIM PlanetQuest, would be able to ... > full story -
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 -
Two New Dusty Planetary Disks May Be Astrophysical Mirrors Of Our Kuiper Belt
January 19, 2006 — In the search for planetary systems like our own, scientists are peering at nearby stars in search of dusty debris disks that presumably accompany planets. UC Berkeley astronomer Paul Kalas has just ... > full story
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