A few months after the USSR launched Sputnik, the US's first satellite, Explorer 1, was launched into space #OTD in 1958. Explorer 1 measured the radiation environment in Earth orbit, leading to the discovery of the Van Allen Belts.
(1) Cape Canaveral launch of 30-pound Explorer satellite by 3-stage Redstone missile, press conference with von Braun and Van Allen with model, night time...
Eagle Globe & Flanker
in reply to NASA • • •