Explorer 2
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Explorer 3
1958 in science
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Bill Pickering (rocket scientist)
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James Van Allen
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Explorer 4
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Sergei Korolev
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Space Race
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Sputnik 2
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Pioneer 3
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Juno I
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Explorer 1
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Timeline of artificial satellites and space probes
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X-ray astronomy
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Magnetosphere
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March 26
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Explorers Program
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Explorer III
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