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.
Four Months As One Moment
This composite image from the Blue Marble series was released in 2002. Much of the information contained in this image came from MODIS on board the Terra satellite. Land and coastal ocean portions of the image are based on surface observations collected from June through September 2001. Other elements include two types of ocean data, an elevation data set, polar sea ice, and clouds. Credit: NASA