International Geophysical Year Collection

Explorer 1 in orbit
Explorer 1. Computer artwork of Americas first successful artificial satellite, Explorer 1, in orbit. Explorer 1 was launched on 31 January 1958

Explorer 1 in orbit, artwork
Explorer 1 in orbit. Computer artwork of Americas first successful artificial satellite, Explorer 1, in orbit over Earth. Explorer 1 was launched on 31 January 1958

Explorer 1 launch. Explorer 1, Americas first successful artificial satellite, being launched by a Jupiter-C rocket from Cape Canaveral (now Kennedy Space Centre), Florida, USA, on 31 January 1958

Explorer 1. Computer artwork of Americas first successful artificial satellite, Explorer 1 showing part of its interior. Explorer 1 was launched on 31 January 1958

Explorer 4 launch. Explorer 4 being launched by a Jupiter-C rocket from Cape Canaveral (now Kennedy Space Centre), Florida, USA, on 26 July 1958

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