America’s robot spacecraft, the Viking I, successfully landed on Mars.
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The crew of Soviet spacecraft 'Soyuz 11' dies after the loss of air supply.
Japan launched its first lunar probe, Hiten, from the Uchinoura Space Center.
The first commercial communications satellite is launched.
The USSR launched the Mars 7 spacecraft from the Baikonur Cosmodrome in modern-day Kazakhstan.
NASA launched the Columbia Space Shuttle for its final test flight, STS-4.
