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25 to 36 of 36 stories (7 over past year)
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Scientists Discover Solar System's Tenth Planet -- Bigger Than Pluto
July 29, 2005 — A planet larger than Pluto has been discovered in the outlying regions of the solar system. The planet was discovered using the Samuel Oschin Telescope at Palomar Observatory near San Diego, Calif. ... > full story -
NASA's Hubble Chases Unruly Planet
June 22, 2005 — A detailed image from NASA's Hubble Space Telescope offers the strongest evidence yet that an unruly and unseen planet may be gravitationally tugging on a dusty ring around the nearby star Fomalhaut ... > full story -
Astronomers Discover Beginnings Of 'Mini' Solar System
February 8, 2005 — Moons circle planets, and planets circle stars. Now, astronomers have learned that planets may also circle celestial bodies almost as small as planets. NASA's Spitzer Space Telescope has ... > full story -
Hubble’s Infrared Eyes Home In On Suspected Extrasolar Planet
January 11, 2005 — Unique follow up observations carried out with the NASA/ESA Hubble Space Telescope are providing important supporting evidence for the existence of a candidate planetary companion to a relatively ... > full story -
Did Our Sun Capture Alien Worlds? Close Encounter May Explain Some Objects Beyond Neptune
December 8, 2004 — Computer simulations show a close encounter with a passing star about 4 billion years ago may have given our solar system its abrupt edge and put small, alien worlds into distant orbits around our ... > full story -
Good News For Pluto: KBOs May Be Smaller Than Thought
November 16, 2004 — Pluto's status as our solar system's ninth planet may be safe if a recently discovered Kuiper Belt Object is a typical "KBO" and not just an oddball. Astronomers have new evidence ... > full story -
Cassini VIMS Team Finds That Phoebe May Be Kin To Comets
June 24, 2004 — Scientists may at last have settled the debate on the origin of Saturn's moon, Phoebe. Saturn long ago captured its largest outermost satellite, Phoebe, when the moon wandered in from the frigid ... > full story -
Solar System 'Fossils' Discovered By Hubble Telescope
September 8, 2003 — Astronomers using NASA's Hubble Space Telescope have discovered three of the faintest and smallest objects ever detected beyond Neptune. Each lump of ice and rock is roughly the size of ... > full story -
Hubble Spots An Icy World Far Beyond Pluto
October 8, 2002 — NASA's Hubble Space Telescope has measured the largest object in the solar system ever seen since the discovery of Pluto 72 years ago. Approximately half the size of Pluto, the icy world 2002 ... > full story -
Astronomers Discover Apparent "Outer Edge" To The Solar System
October 30, 2000 — Our solar system may have an outer "edge" just outside the orbit of Pluto, astronomers announced recently. Their results suggest that early in the history of the solar system, some event ... > full story -
University Of Arizona Scientists Are First To Discover Debris Disk Around Star Orbited By Planet
October 23, 1998 — Planetary scientists have discovered the first circumstellar disk ever seen around a star like our sun, a star known to be orbited by a planet. The system is more like our solar system than any yet ... > full story
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