explorer 1 wikipedia - EAS
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Explorer 1 was the first satellite launched by the United States in 1958 and was part of the U.S. participation in the International Geophysical Year (IGY). The mission followed the first two satellites the previous year; the Soviet Union's Sputnik 1 and Sputnik 2, beginning the Cold War Space Race between the two … See more
The U.S. Earth satellite program began in 1954 as a joint U.S. Army and U.S. Navy proposal, called Project Orbiter, to put a scientific satellite into orbit during the International Geophysical Year. The proposal, using a … See more
After a jet stream-related delay on 28 January 1958, at 03:47:56 GMT on 1 February 1958 the Juno I rocket was launched, putting Explorer 1 into orbit with a perigee of 358 km (222 mi) and an apogee of 2,550 km (1,580 mi) having a period of 114.80 minutes, and … See more
Explorer 1 was the first of the long-running Explorers program. Four follow-up satellites of the Explorer series were launched by the Juno I launch vehicle in 1958, of these, … See more
Explorer 1 was designed and built by the California Institute of Technology's JPL under the direction of Dr. William H. Pickering. … See more
The Explorer 1 payload consisted of the Iowa Cosmic Ray Instrument without a tape data recorder which was not modified in time to make it onto the spacecraft. The real-time data received on the ground was therefore very sparse and puzzling showing normal … See more
Explorer 1 changed rotation axis after launch. The elongated body of the spacecraft had been designed to spin about its long (least- See more
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