Welcome! Follow the steps below to verify and access your download. Click the button below to start verification.
The Assayer
Controversy over comets and The Assayer See also: The Assayer § Grassi on the comets In 1619, Galileo became embroiled in a controversy with Father Orazio Grassi, professor of mathematics at the Jesuit Collegio Romano. It began as a dispute over the nature of comets, but by the time Galileo had published The Assayer (Il Saggiatore) in 1623, his last salvo in the dispute, it had become a much wider controversy over the very nature of science itself. The title page of the book describes Galileo as a philosopher and "Matematico Primario" of the Grand Duke of Tuscany.[100] Because The Assayer contains such a wealth of Galileo's ideas on how science should be practised, it has been referred to as his scientific manifesto.[101][102] Early in 1619, Father Grassi had anonymously published a pamphlet, An Astronomical Disputation on the Three Comets of the Year 1618,[103] which discussed the nature of a comet that had appeared late in November of the previous year. Grassi concluded that the comet was a fiery body that had moved along a segment of a great circle at a constant distance from the earth,[104][105] and since it moved in the sky more slowly than the Moon, it must be farther away than the Moon.[citation needed] Grassi's arguments and conclusions were criticised in a subsequent article, Discourse on Comets,[106] published under the name of one of Galileo's disciples, a Florentine lawyer named Mario Guiducci, although it had been largely written by Galileo himself.[107] Galileo and Guiducci offered no definitive theory of their own on the nature of comets,[108][109] although they did present some tentative conjectures that are now known to be mistaken. (The correct approach to the study of comets had been proposed at the time by Tycho Brahe.) In its opening passage, Galileo and Guiducci's Discourse gratuitously insulted the Jesuit Christoph Scheiner,[110][111][112] and various uncomplimentary remarks about the professors of the Collegio Romano were scattered throughout the work.[110] The Jesuits were offended,[110][109] and Grassi soon replied with a polemical tract of his own, The Astronomical and Philosophical Balance,[113] under the pseudonym Lothario Sarsio Sigensano,[114] purporting to be one of his own pupils.[citation needed]
If Any Button Is Not Working Please Comment Down We Will Fix it As Soon As Possible Thankyou For Visting 🤝🫂