After data returned by JPL’s Mariner spacecraft reveals that – as JPL predicted – Mars has a thin atmosphere and very low atmospheric pressure, plans for a Saturn V-launched orbiter with two 10,000-pound Mars landers are scuttled. The Voyager Mars mission, not expected to launch until 1973, proved too complex and costly for the current state of the art. The Voyager name will later be bestowed upon a pair of Mariner spacecraft exploring beyond the orbit of Mars, while the Voyager concept will later be scaled down to a more feasible and cost-effective orbiter/lander combination called Viking.
Voyager mission cancelled
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