Dwarf Planet, Cause of Strife, Gains &#8216;the Perfect Name&#8217;
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Eris is the new name for the solar body formerly known as Xena, while Pluto has a new number.
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European scientists have discovered what they describe as the smallest Earth-like planet orbiting a star outside of our Solar System.
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U.S. scientists using NASA's Spitzer Space Telescope have discovered a small brown dwarf star, 50 times the mass of Jupiter.  The star is orbiting with a planet around a sun-like star in an arrangement astronomers say has never been observed before.
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The universe looked a little more familiar and friendlier on Tuesday. The roll call of planets beyond the solar system swelled significantly with the announcement of a trio of newly discovered worlds much
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The space rock formerly known as Xena The distant rock which prompted astronomers to strip Pluto of its planethood has been offically named Eris, the International Astronomical Union (IAU) announced Wednesday.â¦
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Signs of ancient eruptions indicate a planet geologically active and may suggest presence of simple life forms. By Peter N. Spotts | Staff writer of The Christian Science Monitor.
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Astronomers are rubbing their eyes after discovering that a galaxy assumed to have been a giant for the past 23 years is in fact a dwarf, according to new observations.
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Astronomers discover a newborn planet in a solar system that is still in the process of forming.
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The leading theory of how planets form is being revised because of new observations from the US Spitzer Space Telescope. The process is not as smooth and quiet as once thought, but rather the result of violent collisions between massive space rocks.
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A group of European-led astronomers has made a photograph of what appears to be a planet orbiting another star. If so, it would be the first confirmed picture of a world beyond our solar system.
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With the help of a modified backyard telescope, astronomers have discovered a giant planet orbiting another star. It is the first extrasolar world found with such modest equipment.
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A tiny telescope has spotted a giant planet circling a faraway star, using a technique that could open a new phase of planetary discovery, scientists say.
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Planets form more violently than once thought, and many solar systems are strewn with dust from collisions like a blast that may have created Earth&#39;s moon, according to new findings.
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AUSTIN, Texas &mdash; An extrasolar planet about one-fourth the heft of Jupiter might have formed from the collision and merger of two planets, astronomers announced today.
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A large planet-like object out in the realm of Pluto shows signs of either a relatively recent collision or perhaps volcanic activity, astronomers said today.
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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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Pluto, now that it is no longer a planet, has been assigned the number 1340340 in the catalog of minor planets.