Viking 1 (aug 20, 1975 – nov 13, 1982)
Description:
Viking 1 was launched to 21 Aug, 1975 and it arrived the orbit of Mars of Jun 19, 1976 and it landed on Mars of Aug 17, 1980Added to timeline:
Date:
aug 20, 1975
nov 13, 1982
~ 7 years and 2 months