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Explorer 1
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Explorer 1
Explorer 1, Americas first successful artificial satellite, being placed in position in the nose cone of a Jupiter C rocket ready for launch. Explorer 1 was launched on 31 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
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6441971
© NASA/VRS/SCIENCE PHOTO LIBRARY
1900s 1950s 31 January 1958 Artificial Satellite Cosmic Ray Research Explorer 1 International Geophysical Year Jet Propulsion Laboratory Juno Launcher Nasa North American Preparing Rocket Satellite 1958 Alpha Space Flight Space Race Us A Van Allen Radiation Belt Mono Chrome
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