A new study using NASA satellite data finds East Antarctica's ice sheet may not be as stable as previously thought.
The team operating NASA's Mars Reconnaissance Orbiter plans to uplink protective files to the spacecraft next week as one step toward resuming the orbiter's research and relay activities.
In the first video showing the auroras above the northern latitudes of Saturn, Cassini has spotted the tallest known "northern lights" in the solar system, flickering in shape and brightness high above the ringed planet.
NASA mission managers are assessing options for future operations of the venerable QuikScat satellite following the age-related failure of a mechanism that spins the scatterometer antenna.
NASA's Wide-field Infrared Survey Explorer, or Wise, is now perched atop its rocket in preparations for a Dec. 9 liftoff.
NASA's Spitzer Space Telescope has contributed to the discovery of the youngest brown dwarf ever observed -- a finding that, if confirmed, may solve an astronomical mystery about how these cosmic misfits are formed.
NASA's Cassini spacecraft has sailed seamlessly through the Nov. 21 flyby of Saturn's moon Enceladus and started transmitting uncalibrated temperature data and images of the rippling terrain.
NASA's planet-hunting Kepler space telescope has earned the 2009 Best of What's New Grand Award from Popular Science and a 2009 Breakthrough Award from Popular Mechanics.