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Reference.org
Juno II
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<p>Juno II was an American <a href="/facts/Launch_vehicle/g1GCGFJB">space launch vehicle</a> used during the late 1950s and early 1960s. It was derived from the <a href="/facts/PGM-19_Jupiter/KD3QYXY0">Jupiter</a> missile, which was used as the first stage. </p>