Il saggiatore galileu galileo biography

1623 book by Galileo Galilei

The Assayer (Italian: Il saggiatore) is a book by Galileo Galilei, published in Rome in October 1623.

It is generally considered to be one of the pioneering works of the scientific method, first broaching the idea that the book of nature is to be read with mathematical tools rather than those of scholastic philosophy, as generally held at the time.

Despite the retroactive acclaim given to Galileo's theory of knowledge, the empirical claims he made in the book—that comets are sublunary and their observed properties the product of optical phenomena—were incorrect.^[1]

Background – Galileo vs.

Grassi on comets

See also: Galileo Galilei § Controversy over comets and The Assayer

In 1619, Galileo became embroiled in a controversy with Father Orazio Grassi, professor of m