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| International Geophysical Year 1957-58 stamp on first day cover signed by Dr. James Van Allen. The Van Allen radiation belts were named after him, following his discovery using Geiger–Müller tube instruments on the 1958 satellites (Explorer 1, Explorer 3, and Pioneer 3) during the International Geophysical Year. |
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| A rocket mail that marks the end of International Geophysical Year on December 31, 1958. |
