Viking 1 Lands on Mars - 1976 | Today in History | 20 July 16
Viking 1 , 1976
Viking 1 was the first of two identical probes, each consisting of an orbiter designed to photograph the surface of Mars and a lander. It was the first spacecraft to land successfully on Mars and perform its mission. Besides surveying the red planet, the lander performed an experiment to test relativistic time dilatation.
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