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Posted on November 7, 2013

Mercury-Atlas 9 was the fourth and final manned orbital flight of the Mercury program. The flight objectives were to:

(1) evaluate the effects on the astronaut of approximately one day in orbital flight;

(2) verify that man can function for an extended period in space as a primary operating system of the spacecraft; and,

(3) evaluate in a manned one-day mission the combined performance of the astronaut and a Mercury spacecraft specifically modified for the mission…

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