1 a – air and – 2012-05-15
A model of Explorer 1, the first artificial satellite launched by the United States, on display in the Smithsonian Air and Space Museum in Washington, D.C. In 1954, U.S. scientists and military officials decided to try to launch an artificial satellite during the International Geophysical Year (which ran from July 1957 to June 1958). On [...]
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