[NASA Science Article - 17.07.2009]
Forty years ago, Apollo astronauts set out on a daring adventure to explore the Moon. They ended up discovering their own planet.
How do you discover Earth … by leaving it? It all started with a single photograph:
Apollo 8 was the first crewed Saturn V launch and the first time humans were placed in lunar orbit. Mission plans called for the astronauts to photograph possible landing sites for future missions. Before this, only robotic probes had taken images of the Moon's far side.