The Two-Way
Originally published on Wed January 25, 2012 2:41 pm
The "Blue Marble" image of Earth snapped by the crew of Apollo 17 in 1972 is one of the most famous photos ever taken. When it appeared, we all suddenly saw the world in a much different way.
In the years since, NASA has added other "Blue Marble" photos to its collection, and has used technology to enhance and sharpen the images.
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