Diamond Planets: Rich Possibilities for Other Worlds
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The solid planets in our solar system are made mostly of silicates. Rock, basically. A new study shows that planets around some other stars might be made mostly of carbon instead. Deep inside such worlds, where pressures are intense, the carbon would make layers of diamonds that could be miles thick.
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LOS ANGELES - 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 evidence that the most violent part of the process in forming an Earth-sized planet - the collisions between colossal chunks of rock - may last hundreds of millions of years instead of 10 million years, scientists said Monday at NASA's Jet Propulsion Laboratory in Pasadena, Calif...
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A newfound planet detected by a small, 4-inch-diameter telescope demonstrates that we are at the cusp of a new age of planet discovery. Soon, new worlds may be located at an accelerating pace, bringing the detection of the first Earth-sized world one step closer.
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small-mass planets soon,&quot; said Paul Butler of the Carnegie Institution of Washington, the co-discoverer of one of the new planets.
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NASA's infrared eyes are probing the beginnings of both stars and planets.  In two separate observations, the Spitzer Space Telescope has uncovered the warm glow from a possible stellar infant and an icy disk where planets may one-day form.
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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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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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It may take much longer than scientists have thought for violent turbulence to turn grains of space dust into new planets. A NASA (news - web sites) telescope
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In a solar system thousands of light years away, a star about half the size of our sun is being orbited by two planets that seem like smaller versions of Jupiter and Saturn, astronomers report
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While striving to find ever smaller, more rocky worlds, planet hunters have moved from discovering not just Jupiter-class planets outside our solar system. Now astronomers have found two new Neptune-class planets on their road to pinpointing a new Earth-like system.
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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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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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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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Astronomers find a strange new world that has them pondering again the essential properties of a planet.
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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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New observations of dust around young stars suggest collisions of large asteroid-like objects and fledgling planets are frequent. But that doesn&#39;t likely stop the formation
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MAUNA KEA, Hawaii -- The sharpest image ever taken of a dust disk around another star has revealed structures in the disk which are signs of unseen planets.     Dr...