NASA's planet-hunter Kepler has detected a known planet, demonstrating the telescope's extraordinary capabilities.
Composition measurements by NASA's Opportunity rover confirm that this rock on the Martian surface is an iron-nickel meteorite.
NASA's Spitzer Space Telescope is starting a second career and taking its first shots of the cosmos since warming up.
Five years ago, NASA launched the Aura satellite to study changes in our life-sustaining atmosphere. Look at some of its greatest findings to date.
This false-color image of Earth was taken by the Moon Mineralogy Mapper, one of two NASA instruments onboard the Indian Space Research Organization's Chandrayaan-1 spacecraft.
The Opportunity rover has eyed an odd-shaped, dark rock, about 0.6 meters (2 feet) across on the surface of Mars, which may be a meteorite.
Mars rover engineers at JPL are winding down testing of different escape maneuvers using a test rover in a sand box filled with soil to mimic the Martian surface.
NASA's Jet Propulsion Laboratory is introducing a new Web site that will provide a centralized resource for information on near-Earth objects - those asteroids and comets that can approach Earth.