Viking 1 launch By revinroper Aug 20, 1975 launch Launched on august 20 1975 Period: Aug 20, 1975 to Apr 29, 2012 Viking 1 Viking 1 was launched on August 20th 1975 Jul 19, 1976 entered orbit enterd mars orbit Jul 20, 1976 Seperation Seperated from orbiter on July 20 1976 Jul 20, 1976 landed Nov 12, 1982 died end transmiision to nasa on 11/13/82
