Explorer 1 was less than 2 meters long and weighed about 13.4 kg. The model William Hayward Pickering, James Van Allen, and Wernher von Braun are brandishing triumphantly in this photo is the ...
Explorer 1 was the first successful satellite launched by the United States. It was designed and built by the Jet Propulsion Laboratory (JPL) under the direction of Dr. William Pickering. They ...
On the evening of Jan. 31, 1958, the United States orbited its first satellite -- Explorer 1. The effort was part of the nation's participation in the International Geophysical Year (IGY), a peaceful ...
Add Yahoo as a preferred source to see more of our stories on Google. Explorer 1 became the first successfully launched satellite by the United States when it was sent to space on 31 January 1958. A ...
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