ScienceDaily: Astronomy News |
| Asteroids' close encounters with Mars: Mars, not Earth, shakes up some near-Earth asteroids Posted: 19 Nov 2013 08:28 AM PST 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 have crashed to Earth? |
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