It's Done With Math
14 April 2011
How were we able to reposition Stardust NExT -- a spacecraft that had been in space for 12 years -- to intercept a rotating comet travelling 24700 mph in the other direction? The answer? "It's done with math!" Read Column
About: Dr. James Green
Dr. Green is the Director of Planetary Science at NASA Headquarters. He views his job as the keeper of NASA's planetary program and the top advocate for that program to flourish and grow.