The mapping of Mars’ surface began.
Mariner 9 started mapping over 85% of the surface area of Mars on this day.
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NASA launched Intelsat VA F-11 into orbit.
STS 77 (Endeavour 11) was launched into orbit.
The Luna 2 spacecraft by the Soviet Union became the first human-made artifact to land on the moon's surface.
The unmanned space mission Luna 21 was launched.
NASA launched the Viking 1 planetary probe toward Mars.
