News tagged with asteroid belt

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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
5 / 5 (5) 0 | with audio podcast

When is an asteroid not an asteroid?

(PhysOrg.com) -- On March 29, 1807, German astronomer Heinrich Wilhelm Olbers spotted Vesta as a pinprick of light in the sky. Two hundred and four years later, as NASA's Dawn spacecraft prepares to begin ...

Mar 30, 2011
4.8 / 5 (10) 4 | with audio podcast