News tagged with asteroid

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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 ...

Nov 19, 2013
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NEOWISE—a yearlong look at the sky

NASA's Near-Earth Object Wide-field Survey Explorer (NEOWISE) spacecraft discovered and characterized 40 near-Earth objects (NEOs) in the first year after the mission was re-started in December 2013. Eight ...

Jan 20, 2015
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Vesta is not an intact protoplanet

Nearly forty years ago, Guy Consolmagno was young graduate student at the University of Arizona's Department of Planetary Sciences; his work there with the late Michael Drake first proposed that asteroid ...

Dec 16, 2014
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How big are galaxies?

I'm going to refrain from the initial response that comes to mind… actually, no I won't—they're really, really, really big!!!!

Apr 03, 2013
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