Dec 19 1969

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Results of Apollo 11 experiment to trap atomic particles from solar wind on lunar surface [see Aug. 18] were reported in Science by originator Dr. Johannes Geiss and Univ. of Berne, Switzerland, team. Helium-4 solar wind flux during Apollo 11 excursion was 5.1 million to 7.5 million atoms per sq cm per sec. Solar wind direction and energy were essentially not perturbed by moon. Evidence for solar wind albedo had been found. (Science, 12/19/69, 1502-3)

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