The Viking landers are two robotic U.S. spacecraft launched by the National Aeronautics and Space Administration (NASA) for the study of the planet Mars. Viking 1 landed in the region of Chryse Planitia (22° N, 48° W) on July 20, 1976, and Viking 2 landed 6,500 km (4,000 miles) away in Utopia Planitia (48° N, 226° W) several weeks later on September 3.
Mars Article
When did Viking 1 and Viking 2 land on Mars?
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