Viking Lander Landing Sequence

Illustration Showing the Landing Sequence of the Viking Lander
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This artist's representation shows the landing sequence of the Viking landers on the surface of Mars. Each Viking spacecraft consisted of an orbiter and a lander. The Viking 1 lander worked for more than 6 years after landing on July 20, 1976. Viking 2 landed two months later on the other side of Mars, where it transmitted data for over 3½ years.