Say "hi!" to asteroid -- actually, asteroids -- (285263) 1998 QE2

Posted by Emily Lakdawalla on 2013/05/30 06:51 CDT | 8 comments

A large asteroid is passing reasonably close to Earth in a few hours, and astronomers at the great radio telescopes at Goldstone and Arecibo are zapping it. The latest discovery: QE2, like many asteroids, is a binary.

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How radar tracking of asteroids helps us know where they are

Posted by Emily Lakdawalla on 2013/05/23 11:32 CDT | 5 comments

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Pretty picture: Talking to GRAIL

Posted by Emily Lakdawalla on 2011/09/12 07:47 CDT

Pretty picture: Talking to GRAIL

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