NASA launched today a new Landsat earth observation spacecraft, continuing the series of Landsat missions that go back to 1972: NASA launches $855 million Landsat mission – CBS News.

Check out this cool LandsatLook Viewer. You can compare images of a given location as seen by Landsats over the decades.

Update: Via the Original Rocket Dungeon comes this cool video of the separation of the Landsat spacecraft from the upper stage booster and then drifting toward the rising sunlight: