Mars Global Surveyor was the first successful U.S. mission launched to Mars after the Viking mission in 1976.
Mars Global Surveyor was the first successful U.S. mission launched to Mars after the Viking mission in 1976. After arriving at Mars, the surveyor made multiple discoveries, including signs of past, persistent water such as an ancient delta and currently active water features in the gullies of canyon walls. After nearly a decade of discovery, the surveyor went silent in November 2006. > Read More