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Solar System Exploration
Pioneer 4 on Top
Pioneer 4 on Top (click to enlarge)

Pioneer 4 on Top
Date: 16 Feb 1959

This is an image of Pioneer IV, payload for AM-14 (Juno II), being installed onto the fourth stage on the cluster before a spin test.

The Pioneer IV, lunar and planetary exploration satellite, was the fifth U.S. moon mission and the first U.S. satellite to orbit the sun.

Credit: NASA

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Last Updated: 22 Apr 2013