Mariner 9
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This view of channels on Mars came from NASA's Mariner 9 orbiter. In 1971, Mariner 9 became the first spacecraft…

This image from NASA's Mariner 9 taken in 1971 is a view of a canyon system emerging from the Martian…

This mosaic of NASA's Mariner 9 frames (top), taken during the first orbit, shows the remnants of the south polar…

This is an oblique view of the crater complex near Ascraeus Lacus in the Tharsis region of Mars was taken…

This image from NASA's Mariner 9 taken on Dec. 17, 1971 is a view of a complex crater on the…

NASA's Mariner 9 took this picture of Mars during the closing hours of its approach to the planet on November…

NASA's Mariner 9 took this picture of Mars on November 11, 1971, during its approach to the planet. The south…

The most conspicuous feature yet observed on Mars by NASA's Mariner 9 in 1971 is the darkish spot located near…

A Martian shield volcano, ~25 miles across at the crater, photographed consecutively by NASA's Mariner 9 with the wide-angle and…