New planets in a class of their own: astronomers
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WASHINGTON - Astronomers in the US say they&#39;ve discovered a new class of planets orbiting stars outside our solar system. The two &quot;exoplanets&quot; are small compared to earlier finds.
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Astronomers have found a miniature version of our own solar system 5,000 light years across the galaxy â the first planetary system that really looks like our own.
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The first precise measurement of a failed star known as a brown dwarf finds the object is much more massive than theorists expected. The result challenges what astronomers&nbsp;assumed about these strange things, which straddle the mass range between huge planets and normal stars.
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Earth-size planets form around other stars in a process that&#39;s considerably longer and more violent than previously believed, a team of astronomers using NASA&#39;s Spitzer Space Telescope announced Monday.
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NASA's Spitzer Space Telescope has captured for the first time enough light from planets outside our solar system, known as exoplanets, to identify signatures of molecules in their atmospheres.
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It may take much longer than scientists have thought for violent turbulence to turn grains of space dust into new planets. A NASA telescope recently discovered
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The collisions that spawn planets are bigger and take place over longer periods of time than previously thought, say astronomers who studied nearly 300 stars with NASA&#39;s Spitzer Space Telescope.
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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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A trio of newly discovered worlds are much smaller than any other planets previously discovered outside of the solar system.
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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, according to scientists.
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Two separate teams of astronomers find Neptune-size planets beyond our solar system. Earth-like planets are just around the corner, they say. By Amit Asaravala.
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The 130 extrasolar planets discovered so far are in solar systems very different from our own, in which life-bearing planets like Earth are unlikely to exist. But an obscure characteristic of these planets and their stars has led astronomers to predict that our galaxy is brimming with solar systems like ours. The key to their prediction is something called metallicity.
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Astronomers say they have discovered the youngest planet to date circling a sun-like star, a find that will be a boon to the field of planet-formation theory.
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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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Honolulu, HawaiiÂ -- The world's largest and most prolific team of planet hunters announced Monday the discovery of 28 new planets outside our solar system, increasing to 236 the total number of known exoplanets.University of California, Berkeley, post-doctoral fellow Jason T.
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Astronomers have discovered the three lightest planets known outside the solar system, moving researchers closer to the goal of finding extrasolar planets that resemble Earth.
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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