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Cometa Halleyanus,[1] designatione astronomica 1P/Halley, est notissimus cometes periodicus, qui post intervalla 75 sive 76 annorum paret. Observabatur ab astronomis utique ab anno 240 a.C.n., atque ex Edmundo Halley, astronomo Anglico, qui primum orbitam et periodum cometae computavit, appellatur.
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