Meet Comet Hartley 2!
6 November 2010
On Thursday, our EPOXI spacecraft sent us breathtaking close up images of Comet Hartley 2. The images reveal a little world that's fascinatingly different from any of the other comets we have seen. Read Column
Planetary Science: Birth of New Worlds
1 November 2010
NASA's Year of the Solar System is underway -- the start of a tremendous revolution in planetary science. Whole new worlds are opening to us! 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.
