Explorer 1

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Explorer 1

Explorer 1, surrounded by the engineers who created it. Explorer 1 was the first successful American artificial satellite. It was launched on 31st January 1958, after the USSR took the USA by surprise by launching the worlds first artificial satellite, Sputnik 1, on 4 October 1957. The satellite measured 2.05 metres in length and weighed 14 kilograms. It orbited Earth at heights of between 360 kilometres and 2520 kilometres until 31 March 1970. It carried a geiger counter, used to detect cosmic rays. Data collected by the satellite led to the discovery of the Van Allen radiation belt, a torus of charged particles held in place by the Earths magnetic field

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Media ID 6444159

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1900s 1950s 31 January 1958 Artificial Satellite Cosmic Ray Research Engineer Explorer 1 International Geophysical Year Jet Propulsion Laboratory Nasa North American Satellite 1958 Alpha Scientist Space Flight Space Race Us A Van Allen Radiation Belt Mono Chrome

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