The original Blue Marble image is a famous photograph of the Earth, taken on 7 December, 1972, by the crew of the Apollo 17 spacecraft, at a distance of about 45,000 kilometres.

Viewers of a certain age (including my own) may remember the children's TV show Big Blue Marble—reminiscent of the photograph of our water world taken by Apollo 17 astronauts in 1972 (top).I ...

A new satellite photograph of Earth depicts our planet in all its aquatic splendor, revealing a truth somewhat obscured in the original Blue Marble image. That photograph is among the defining ...