This Earth Day, NASA and the U.S. Geological Survey celebrates the environment by looking back at some of the impressive data sets from Landsat, a joint mission of NASA and U.S. Geological Survey. Through these Earth images and others, scientists can monitor the place that over seven billion people call home. + more
+ Environmental Watch with Landsat satellites
Northrop Grumman recently signed agreements to license three technologies from NASA related to satellite servicing.