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Explorer XX Is Prepared for Launch

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NASA

May 05, 2009
Image Article
Researchers prepare Explorer XX, the Topside Sounder IE-A, for launch.
Researchers prepare Explorer XX, the Topside Sounder IE-A, for launch. The satellite was put into orbit on 25 August 1964.

Researchers prepare Explorer XX, the Topside Sounder IE-A, for launch. The satellite was put into orbit on 25 August 1964.

Image Credit: NASA Goddard