“Revealing great, unusual, and remarkable spectacles, opening these to the consideration of every man, and especially of philosophers and astronomers; as observed by Galileo Galilei, Gentleman of Florence, Professor of Mathematics in the University of Padua, with the aid of a spyglass lately invented by him, in the surface of the Moon, in innumerable fixed stars, in nebulae, and above all in four planets swiftly revolving about Jupiter at differing distances and periods, and known to no one before the author recently perceived them and decided they should be named the Medicean Stars”

— Galileo Galilei , book Sidereus Nuncius

Translation by Stillman Drake in Discoveries and Opinions of Galileo (1957)
Sidereus Nuncius (Venice, 1609)

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Galileo Galilei 70

Italian mathematician, physicist, philosopher and astronomer 1564–1642

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“What was observed by us in the third place is the nature or matter of the Milky Way itself, which, with the aid of the spyglass, may be observed so well that all the disputes that for so many generations have vexed philosophers are destroyed by visible certainty, and we are liberated from wordy arguments.”
Quòd tertio loco à nobis fuit obſeruatum, eſt ipſiuſmet LACTEI Circuli eſſentia, ſeu materies, quam Perſpicilli beneficio adeò ad ſenſum licet intueri, vt & altercationes omnes, quæ per tot ſæcula Philoſophos excrucia runt ab oculata certitudine dirimantur, nosque à verboſis dſputationibus liberemur.

Galileo Galilei book Sidereus Nuncius

Original text as reproduced in Edward Tufte, Beautiful Evidence (Cheshire, Connecticut: Graphics Press LLC, 2006), 101 (p. 3 of 4, insert between pp. 16V & 17R. Original manuscript renders the "q" in "nosque" with acute accent.)
Translation by Albert Van Helden in Sidereus Nuncius (Chicago, 1989), 62
Sidereus Nuncius (Venice, 1609)

“His [Sarpi's] career soon revealed another cause of his return; he evidently felt the same impulse which stirred his contemporaries, Lord Bacon and Galileo, for he began devoting himself to the whole range of scientific and philosophical studies, especially to mathematics, physics, astronomy, anatomy, and physiology. In these he became known as an authority, and before long was recognized as such throughout Europe. It is claimed, and it is not improbable, that he anticipated Harvey in discovering the circulation of the blood, and that he was the forerunner of noted discoverers in magnetism. Unfortunately the loss of the great mass of his papers by the fire which destroyed his convent in 1769 forbids any full estimate of his work; but it is certain that among those who sought his opinion and advice were such great discoverers as Acquapendente, Galileo, Torricelli, and Gilbert of Colchester, and that every one of these referred to him as an equal, and indeed as a master.”

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p, 125
Astronomical Observations relating to the Construction of the Heavens... (1811)

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Galileo Galilei 70

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