On November 3, 1960, a Juno II sent Explorer VIII into a 1,000-mile deep orbit within the ionosphere. In 1961, Juno II launched an 82-pound satellite into orbit to conduct a complex gamma-ray astronomy experiment. | On November 3, 1960, a Juno II sent Explorer VIII into a 1,000-mile deep orbit within the ionosphere. In 1961, Juno II launched an 82-pound satellite into orbit to conduct a complex gamma-ray astronomy experiment. |