Voyager program (Mars)

Advanced Voyager concept (1967)
The upper Voyager moves away from the Saturn V S-IVB third stage that placed it on course for Mars.

The Voyager Mars Program was a planned series of uncrewed NASA probes to the planet Mars. The missions were planned, as part of the Apollo Applications Program, between 1966 and 1968 and were scheduled for launch in 1974–75. The probes were conceived as precursors for a crewed Mars landing in the 1980s.