[Home]Explorer program

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The Explorer program was the United States' first successful attempt to launch unmanned space missions. It began as an attempt to place an artificial satellite into orbit during the [International Geophysical Year]?, and became an attempt to catch up with the Soviet Union after that nation's launch of Sputnik I on October 4, 1957.

Explorer I was launched on January 31, 1958 and attained Earth orbit. Its instruments detected the [Van Allen radiation belts]?.

(other craft in the Explorer program here)


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Last edited October 10, 2001 8:47 pm by RjLesch (diff)
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