Planets form twice for old stars
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Two old stars appear to be generating planets long after the normal period, astronomers say.
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A giant hydrogen gas cloud will create new stars when it hits our galaxy in 20-40 million years' time.
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Three planets will align over the weekend, giving Iowans a glimpse at something they haven't seen for at least 100 years, astronomy experts said.
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Astronomers spot a space oddity in Earth's neighbourhood: a dead star with unusual characteristics.
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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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By SETH BORENSTEIN  CAPE CANAVERAL, Fla. - Stargazers will get a rare triple planetary treat this weekend with Jupiter, Mercury and Mars appearing to nestle together in the predawn skies.
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By SETH BORENSTEIN   Associated Press writer  CAPE CANAVERAL, Fla. -- Stargazers will get a rare triple planetary treat this weekend with Jupiter, Mercury and Mars appearing to nestle together in the predawn skies.
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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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Stargazers will get a rare triple planetary treat this weekend with Jupiter, Mercury and Mars appearing to nestle together in the predawn skies. About 45 minutes before dawn on Sunday those three planets will be so close that the average person's thumb can obscure all three from view.
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A team of astronomers announced last week the discovery of some of the smallest planets yet detected beyond our solar system. The two newly discovered planets represent a new class of extrasolar planets, and
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Two new discoveries suggest that sunlike solar systems like ours â with life-hosting planets â are more common than previously thought.
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When a binary star system starts to transfer mass, one of the twins may well win out, leaving its companion to occupy a strange region half way between a star and a planet. A new star-type of this sort has been found, which resembles the infrared ash of a stillborn star.
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The outer reaches of our solar system may have been shaped long ago by a close encounter with another star that tore up both nascent planetary systems like colliding buzz saws, astronomers said on Tuesday.
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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 find a strange new world that has them pondering again the essential properties of a planet.
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Four hundred years ago, sky watchers, including the famous astronomer Johannes Kepler, best known as the discoverer of the laws of planetary motion, were startled by the sudden appearance of a "new star" in the western sky, rivaling the brilliance of the nearby planets.
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According to Kenyon and Bromley&#39;s simulation, such an encounter took place more than 4 billion years ago - 100-200 million years after the Sun&#39;s birth.