blobrana
01-18-08, 02:27 PM
A half-century ago, the Jet Propulsion Laboratory's Explorer 1 spacecraft became America’s first Earth-orbiting satellite when it flew into space on Jan. 31, 1958.
Read more (http://www.jpl.nasa.gov/explorer/?msource=00808&tr=y&auid=3316844)
Read more (http://www.jpl.nasa.gov/explorer/?msource=00808&tr=y&auid=3316844)