Pluto isn't even largest dwarf planet
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Pity poor Pluto, the puny former planet is facing yet another indignity. Demoted from planethood a year ago into a new category of dwarf planet, it now turns out that it isn't even the biggest one of those.
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NASA's Spitzer Space Telescope has spotted a dusty disc of material around a very small "failed star" called a brown dwarf, raising the possibility that there may be miniature solar systems in which planets orbit objects not much larger than planets, scientists said Monday.
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The dwarf planet formerly known as Xena received a new name, while Pluto was given a number to reflect the loss of its status as a planet.
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By Jeremy Manier, Chicago Tribune  Sep. 15--Lucy Lawless, take heart.   Astronomers may have given a snub to the TV actress who starred in "Xena: Warrior Princess," when they conferred a new name on a Pluto-sized world they'd previously nicknamed Xena.
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By Michael Stroh< The Baltimore Sun  Call it a mugging in the Milky Way.   In a stunning reversal, astronomers who were ready to expand the solar system's number of planets by three just last week voted to shrink it Thursday instead, stripping Pluto of its status as a planet.
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Astronomers meet in Prague to define the meaning of the word planet, and to decide if Pluto really is one.
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Is Pluto a planet? The world's astronomers met in Prague last week to vote on this question, and in a sort of cosmic game of "Survivor," they voted Pluto off the solar system.
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A fierce backlash has begun against the decision by astronomers to strip Pluto of its status as a planet.
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Two new moons orbiting between Mimas and Enceladus, discovered by the NASA/ESA/ASI Cassini-Huygens spacecraft, may be the smallest bodies so far seen around the ringed planet.
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The largest planet ever found orbiting another star is so puffy that it would float on water, astronomers said Thursday.
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Hundreds of U.S. scientists have challenged a recent decision by an international astronomy group to strip Pluto of its planetary status with a petition rejecting its definition of what constitutes a planet.
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Cambridge, MA - Scientists using NASA's Spitzer Space Telescope have discovered and directly imaged a small brown dwarf star, 50 times the mass of Jupiter, orbiting with a planet around a Sun-like star.
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Hawaii&#39;s Keck Observatory has confirmed the existence of a Jupiter-sized planet orbiting a distant star, the first one spotted by a network of astronomers using telescopes no larger than the ones you can buy in stores.
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A study of Plutoâs bright frosts suggests that the way the planet cools down is rapid and disorganised. The results were presented at the European Planetary Science Congress in Berlin.Plutoâs surface is bright because its atmosphere periodically condenses onto the surface.
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The asteroid belt&#39;s largest bodies have drifted virtually alone since their creation about 4.5 billion years ago, but each will soon receive a visit from NASA&#39;s Dawn spacecraft.&nbsp;
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Two Neptune-sized planets have been discovered circling stars beyond our Solar System, US astronomers reported on Tuesday. The discoveries, which come less than a week after a similar announcement by European
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Planet hunters have found two worlds roughly the mass of Neptune, each orbiting a star within 30 light-years of our solar system. The planets are likely gaseous or mixtures of ice and rock, but they might be barren rock worlds like Mercury.