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Relazioni tra Sole e Terra
Storia ed origine dei raggi cosmici
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absorption abundances acceleration activity appears assumed atmosphere bursts calculated changes charge chondrites compared component considered cosmic ray counter curve density detected detector determined direction discussed distance distribution earth earth's magnetic field effect electrons emission energy energy spectrum existence expected experimental experiments flare flux frequency function galactic galaxy geomagnetic give given greater halo important increase integral intensity ionization isotopes Journ known launched less light limit lines lower magnetic field means measurements mechanism meteorites nuclei observed obtained occur orbit origin output particles Phys polarization possible present primary problem produced protons pulse radiation radio range ratio received region relative rigidity rocket satellite shown shows similar solar space spacecraft spectrum stars suggested surface Table temperature theory variations