NASA's Blue Marble: 50 Years Of Earth Images
March 12, 2012 10:00 AM NASA's Earth-observing satellites help scientists render photo-like composite images with unprecedented detail. Take a look, from the earliest attempts to the newest stunners.
Earth Without Clouds
Blue Marble: Next Generation, released in 2005, is based on a year's worth of monthly composites taken in 2004. This image, taken in September 2004, shows South America. The Next Gen series shows seasonal changes to the land surface, including vegetation in temperate regions and snow cover in other places. Credit: NASA