Meteorites,Comets and Asteroids

    • Cometary Closeup
      In a risky flyby, NASA's ailing Deep Space 1 spacecraft successfully navigated past a comet, giving researchers the best look ever inside the glowing core of icy dust and gas.
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    • Making the Moon
      The "giant impact" theory, first proposed in the mid-1970s to explain how the Moon formed, has now received a major boost. New computer simulations demonstrate how a single impact could yield the current Earth-Moon system.
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    • Jupiter-Size Planet Found Orbiting Star in Big Dipper
      A team of astronomers has found a Jupiter-size planet in a circular orbit around a faint nearby star, raising intriguing prospects of finding a solar system with characteristics similar to our own.
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    • Extrasolar Planets with Earth-like Orbits
      Scientists are discovering extrasolar planets with Earth-like orbits. Could it be possible for Earth-like orbiting planets to habor life just like Earth?
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    • Water Worlds
      As an alien sun blazes through its death throes, it is apparently vaporizing a surrounding swarm of comets, releasing a huge cloud of water vapor.
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    • Do We Know What Killed the Dinosaurs?
      What killed the dinosaurs? Many geologists and paleontologists now think that a large asteroid or comet impacting the Earth must have caused a global catastrophe that led to this extensive loss of life.
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    • A Taste for Comet Water
      When Comet LINEAR broke apart last year it revealed what many scientists thought all along: Water in Earth's oceans could have come from outer space.
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    • A Taste for Comet Water
      When Comet LINEAR broke apart last year it revealed what many scientists thought all along: Water in Earth's oceans could have come from outer space.
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    • The Mass Extinction that Left the Dinosaurs Standing
      A mass extinction about 200 million years ago destroyed at least half of the species on Earth, but left the dinosaurs standing.
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    • The Birth and Death of Embryonic Planets
      Researchers study how planets form around stars in the Orion Nebula, hoping to understand better how planets in our own solar system formed.
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    • Was Johnny Appleseed a Comet?
      A new experiment suggests that comet impacts could have sowed the seeds of life on Earth billions of years ago.
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    • An Astronomy First: Telescopes Double-team Hawaiian Night Sky
      Proving that two telescopes are better than one, NASA astronomers have gathered the first starlight obtained by linking two Hawaiian 10-meter telescopes.
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    • A Shortage of Planets
      When they turned the Hubble Space Telescope on a distant globular cluster of stars, astronomers expected to find fifteen or twenty planets. They found zero.
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    • Apocalypse Then
      A violent collision with a space rock, like the one that doomed the dinosaurs, may have also caused our planet's greatest mass extinction 250 million years ago.
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    • A Visit to Cupid for Valentine’s Day
      On February 12, NEAR Shoemaker becomes the first spacecraft to land on an asteroid. Its findings may tell us something about our planet, our solar system, and solar systems beyond our own.
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