GARGANO, MAUROMAUROGARGANO2020-05-182020-05-1820199788869521188http://hdl.handle.net/20.500.12386/24943Giovan Battista Della Porta is known for his idea of experimental science, Fabio Colonna is well-known for his botanical studies, and Francesco Fontana for his powerful telescopes and the exact observations of the Moon and planets. All three interested in astronomy. But when and what was observed in Naples for the first time with a telescope? And by whom? This communication, based on the correspondence of the protagonists, wants to contribute to retrace the events of the first Neapolitan astronomical observations.ELETTRONICOenConference paper10.35948/9788869521188/c25http://www.paviauniversitypress.it/articolo/9788869521188-c25/5624FIS/08 - DIDATTICA E STORIA DELLA FISICA