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Anniversary of the First Nuclear Space Flight

June 29th, 2011

This day…50 years ago! The Earth-orbiting Transit IV-A became the first flight test of a nuclear power source developed for use in spacecraft. Transit IV-A was powered both by solar cells and a radioisotope thermoelectric generator (RTG) using Plutonium 238 for fuel. Built for the U.S. Navy by the Applied Physics Laboratory of Johns Hopkins […]

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