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.
Varied Data Brought Together
The underlying image of the Earth and clouds was taken in September 1997 by NOAA's GOES satellite. The ocean color data was collected by NASA's Wide Field-of-view Sensor satellite, while the land color is based on a vegetation index calculated using data from NOAA's Advanced Very High Resolution Radiometer. Those data sets are combined with a digital elevation model of Earth's topography from the U.S. Geological Survey. The Moon in the upper left was an artistic addition. Credit: NASA
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