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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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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For the first time in almost two years, there are no bright planets in the evening sky. You might as well stay inside and eat dinner. The morning sky, on the other hand, is sparkling. Mercury. Venus. Saturn. A slender crescent Moon. The luminous stars of Orion. They're all on display in the days ahead: Sept. 10th through 12th.
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European scientists have found a planet circling a distant star that could be home to life. The planet, the first detected so far that is enough like Earth for life to develop, orbits a star called mu Arae in the southern constellation Altar.
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Astronomers in Europe and the United States have found two new planets about 20 times the size of Earth beyond the solar system. The discovery might be a giant leap forward in
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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 evidence that
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A supernova spotted by the Danish astronomer Tycho Brahe more than four centuries ago - which changed the course of human knowledge - has just yielded a further discovery: the companion star that triggered the great event.
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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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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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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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New infrared observations of the disks of dust and rock around young stars reveal that many planets apparently form in an environment more violent and chaotic over a longer period of
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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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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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US astronomers announced Tuesday their discovery of two small planets orbiting distant stars, setting off a dispute with European astronomers over who found the new, unusually small class of planets first.
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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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For the first time, scientists have found rings of dust around planet-bearing stars an important confirmation of theories about how planets form, NASA has announced.
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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.