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Asteroids' close encounters with Mars

For nearly as long as astronomers have been able to observe asteroids, a question has gone unanswered: Why do the surfaces of most asteroids appear redder than meteorites—the remnants of asteroids that ...

dateNov 19, 2013 in Space Exploration
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Dawn delivers new image of Ceres

(Phys.org)—As NASA's Dawn spacecraft closes in on Ceres, new images show the dwarf planet at 27 pixels across, about three times better than the calibration images taken in early December. These are the ...

dateJan 19, 2015 in Space Exploration
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