The Blue Marble photo, though, has proven to be the crew’s best known legacy. NASA released the image on Saturday, December 23, 1972, and it made the front page of most newspapers over that long ...

The iconic photo, known as "Blue Marble," was taken by NASA astronauts Eugene "Gene" Cernan, Ronald Evans and Harrison Schmitt on December 7 using a Hasselblad camera and a Zeiss lens, about ...

Here’s how it works. On the left, the original Blue Marble photo taken by the crew of Apollo 17 in 1972. On the left, a computer's recreation that tested a cutting-edge climate model.

But while “Blue Marble” didn’t create an overnight revolution, it came to play an important role in the growing environmental movement. The first Earth Day had been celebrated on April 22, 1970.

But while "Blue Marble" didn't create an overnight revolution, it came to play an important role in the growing environmental movement. The first Earth Day had been celebrated on April 22, 1970.