The US spacecraft, Voyager, took the first-ever photograph of the moon and Earth together from space.
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An asteroid, dubbed 'City Killer,' came closer to Earth than the moon and was almost undetected.
The third and last moonwalk of the Apollo 17 mission began.
The Soviet Union's Luna 5 uncrewed spacecraft crash-landed on the Moon.
The Apollo 11 astronauts were released from a three-week quarantine following their liftoff from the moon.
NASA announced they had found 'Earth's bigger, older cousin.'
