On This Day In 1972, The Apollo 17 Crew Snapped 'The Blue Marble'

Photographed using a 70mm Hasselblad camera with an 80mm Zeiss lens, and credited to all three Apollo 17 astronauts (Eugene Cernan, Ronald Evans and Jack Schmitt), this rare image of a fully-illuminated Earth has become one of the world's most recognisable photographs. No human has since travelled far enough into space to see such a full view of earth, though similar shots have since been taken by unmanned spacecraft.

[NASA History Office; image: Wikimedia]