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2008-01-31 07:35:00

Explorer 1 was the first satellite launched by the United States when it was sent into space on January 31, 1958. The primary science instrument on Explorer 1 was a cosmic ray detector designed to measure the radiation environment in Earth orbit.


Word of the Day
onomatope
  • An imitative word; an onomatopoetic word.
The word 'onomatope' is a back-formation from 'onomatopoeia'.
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