The Blue Marble photograph, taken by the Apollo 17 spacecraft on December 7, 1972, is an iconic and inspiring image. The photograph shows the Earth in all its beauty and majesty, with the deep ...

Nasa's 'Blue Marble' images of our world started in 1972, when Apollo astronauts took an image of our world from 28,000 miles away, looking like a blue marble in space. Since then, the space ...