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HALLEY; Edmund; 1656-1742; GBR

First royal astronomer after FLAMSTEED, Halley was a truthful friend of NEWTON (he even published "Principia", his friend's main work with his own means). He discovered comets' periodicities (he predicted the return of a comet in 1682 and it bears his name since that time). From St-Helen Island, he catalogued 350 southern stars between 1677 and 1678 ("Catalogus Stellarum Australium, 1678), discovered that some had proper motion (based on PTOLEMY's work). He discovered while doing this some nebulae and published a list of 6 objects in 1715 (2 own discoveries).