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 ...
Explorer 1 became the first successfully launched satellite by the United States when it was sent to space on 31 January 1958. A quick response to the Soviet Union’s launch of Sputnik 1, Explorer 1’s ...
A half-century ago, the Jet Propulsion Laboratory’s Explorer 1 spacecraft became America’s first Earth-orbiting satellite when it sailed into space on Jan. 31, 1958. In honor of the historic ...
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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