Mariner 7
March 27, 1969

  Image of Mariner 7
 

Launching 31 days after its twin, Mariner 6, the Mariner 7 spacecraft will trail the first craft by only 5 days when they each have their closest approach to Mars in the summer. Both spacecraft are equipped with more sophisticated instruments than early Mariners and will take more detailed images and study the red planet's atmosphere.

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