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“The Blue Marble” is the first fully illuminated photograph of Earth taken from outer space in 1972 by the Apollo 17 crew as they made their way to the moon. Though blurry and partial images of ...

This strange orb owes its gentle blue glow to solid-state fluorescence. It’s made of an organic material with multiple light-emitting structures that can interact with each other, giving the ...

What we now refer to as the Blue Marble originates from an incredible photograph that was taken 50 years ago by NASA's Apollo 17 crew.

Taken 50 years ago on Wednesday, the “Blue Marble” has become one of the world’s most widely reproduced photographs — and an icon of the environmental movement.

Prior to the "Blue Marble," campaign images had often focused on pollution, gas masks and endangered species.A self-portrait of humanityApollo 17 marked the end of the Apollo lunar exploration ...