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July 26th in Astronomy and Space Science
Unmanned Spaceflight1958US Army launches the Explorer 4 satellite from Cape Canaveral. James Van Allen, studying the data from this and prior Explorer flights discovers belts of radiation trapped in the Earth's magnetic field, today called the Van Allen Belts.
Unmanned Spaceflight1963US launches the Syncom 2 communications satellite, the first satellite to be placed in a geo-stationary orbit. It makes television broadcast of the 1964 Olympic games in Japan possible.
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