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Astrophysicist and space pioneer dies Aug 10

The US astrophysicist James Van Allen died yesterday aged 91. Van Allen was best known for his studies of the Earth's magnetosphere -- the region of space filled by the Earth's magnetic field. In particular, he found bands of intense radiation, later named the Van Allen radiation belts, which he discovered using the first US satellite, Explorer 1. He also conducted the first surveys of the radiation belts of Jupiter and Saturn using the Pioneer 10 and 11 spacecraft.


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