Two asteroids - in unrelated orbits - will pass within moon's distance on September 8. They were discovered on September 5. Neither will strike Earth, scientists say.
NASA lunar scientist Anthony Colaprete is principal investigator of the LCROSS mission that impacted the moon. One of the most fundamental discoveries, he said, was the discovery of water ice.
An asteroid collision likely wiped out the dinosaurs. EarthSky spoke with David Helfand of Columbia University on the risk today from killer asteroids.
A self-guided robotic submarine, designed to look for alien life on an icy moon of Jupiter, completed 6 months of tests in an Antarctic lake here on Earth.
Pendleton, the new director of NASA's Lunar Science Institute, says that moon is our nearest laboratory off-planet where we can go and explore and test.