NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Mariner 9 spacecraft preparation. Scientist working on the Mariner 9 spacecraft before it is locked in its capsule ready for its mission to Mars. Mariner 9 was launched on 30th May 1971. It took more than 7000 photographs of the surface of Mars, allowing accurate maps to be made. It also tracked Mars' two moons, Phobos and Deimos.
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