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August 20th in Astronomy and Space Science
Manned Spaceflight1953US makes the first test launch of the Redstone rocket. This rocket would later carry the first manned Mercury capsule.
Unmanned Spaceflight1975US launches the Viking 2 spacecraft. It is launched 20 days before Viking 1, but arrives at Mars on 7 August 1976, almost 2 months later than its twin. The lander touches down on 3 September 1976 and transmits photos and data for the next 3½ years.
Unmanned Spaceflight1977Voyager 2 launched from the Kennedy Space Center aboard a Titan-Centaur rocket. It performs planetary flybys of Jupiter, Saturn, Uranus, and Neptune.
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