Landsat 7, NASA's newest Earth-observing satellite, launched without a hitch on April 15, 1999, at 2:32 p.m. EST from Vandenberg Air Force Base, California.
Landsat 8 takes a look at Princess Charlotte Bay, Australia, where reefs, river plumes, and sandy islands test the satellite's ability to observe the intersection of land and sea.
The opening of the Landsat data archive and a partnership with Google has allowed researchers to track the fine details of forest change around the world.