Two New Neptune-Sized Planets Discovered
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or about the size of the planet Neptune, say astronomers from the University of Texas and two other institutions.
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Researchers have discovered two planets in a solar system 5,000 light-years away that appears to be structured in some important ways like our own.
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A new class of planets has been found orbiting stars besides our sun, in a possible giant leap forward in the search for Earth-like planets that might harbor life, scientists said on Tuesday.
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A University of Colorado study has embarked on demonstrating that new planets can be found with the help of an orbiting starshade. The method has been compared to building a giant pinhole camera in space.
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The planet with the second largest number of moons now has two more. The US Cassini spacecraft discovered them around Saturn, bringing the giant ringed planet&#39;s known total to 33.
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Astronomers say they have discovered the largest planet ever found, a supersize gas giant about 1.4 times the size of Jupiter that's unlike any other known world.
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Astronomers have discovered four new planets in a week's time, an exciting end-of-summer flurry that signals a sharper era in the hunt for new worlds.    While none of these new bodies would be mistaken as Earth's twin, some appear to be noticeably smaller and more solid - more like Earth and Mars - than the gargantuan, gaseous giants identified before...
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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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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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Astronomers have discovered a new class of planets outside the solar system that hug their parent stars so tightly they take less than a day to complete an orbit.
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The dwarf  planet that effectively forced astronomers to strip Pluto of its planethood is  not only bigger than the former ninth planet, but also much more massive, a new  study finds.
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Astronomers scouring nearby stars have found two planets that mirror Neptune in size, making them by far the smallest found outside the solar system.
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Aug. 31, 2004 - American astronomers say they have discovered the two smallest planets yet orbiting nearby stars, trumping a small planet discovery by European scientists five days ago and capping the latest
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A nearby star thought to harbor comets and asteroids now appears to be home to planets, too. The presumed worlds are smaller than Jupiter and could be as tiny as Pluto, new observations suggest.
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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.
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The roll call of planets beyond the solar system swelled significantly with the announcement of a trio of newly discovered worlds much smaller than any previously discovered around other stars.
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A trio of newly discovered worlds are much smaller than any other planets previously discovered outside of the solar system.