Sputnik 3 was a Soviet scientific satellite launched on 1958-May-15 from Baikonur Cosmodrome by a modified R-7 rocket. It carried a large array of instruments for geophysical research of the upper atmosphere and near space. Sputnik 3 was actually planned to be the first satellite to be sent into space, but complications in its development led to the construction of the much simpler Sputnik 1. It operated in orbit for six weeks, before falling back and reentering the atmosphere just 692 days after launch in April 1960
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