Satellites take pictures of the earth for mapping, weather, science, and security. Art is a low priority when you've spend this much money to launch the camera! But the earth is a beautiful place, and the pictures sometimes are works of art. See Environmental Graffiti's 30 Most Incredible Abstract Satellite Images of Earth.
The images you see below were taken at the turn of the Millennium, when NASA’s scientists had a brilliant idea: to scan through 400,000 images taken by the Landsat 7 satellite and display only the most the most beautiful. A handful of the best were painstakingly chosen and then displayed at the Library of Congress in 2000.
Pictured are underwater sand dunes in the Bahamas. Link -Thanks, Tom!