The last manned lunar flight, Apollo 17, returned to Earth.
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NASA announced they had found 'Earth's bigger, older cousin.'
The Moon was photographed for the first time.
Apollo 17 launched the final manned lunar landing mission, during which the crew took the famous 'blue marble' photo of the entire Earth.
The Soviet Union's Luna 2 space probe became the first spacecraft to reach the moon's surface.
The first photo of the moon was taken by John Draper in New York City.
