June 18, 2009 Slide Show In mid-June, NASA sent its first rocket to the moon in a decade, launching a pair of unmanned science probes designed to search for hidden ice and possible landing sites. Author Andrew Chaikin discusses the mission.
May 21, 2009 Update More than four years after its expected demise, the Mars rover Opportunity continues to send back valuable data. In a new study, researchers have found evidence that an Oklahoma-sized region of the planet was shaped by years of wind and water flows.
May 22, 2009 Slide Show This week, the astronauts aboard the Space Shuttle Atlantis completed the final repairs on the Hubble Space Telescope. NASA hopes the repairs will keep the telescope operating for five more years. View photos from the repair mission.