But some of his observations, especially the changing phases of Venus and the presence of moons around other planets, lent support to Copernicus' heliocentric theory, and that made Galileo's work ...

By the 17th century, famed engineer and astronomer Galileo Galilei refined Copernicus' heliocentric model using observations made with telescopes he built himself. However, it was not until Kepler ...

Two columns have been added, and above them the curtain with the dedication to Galileo’s patron ... but Copernicus looks out toward the reader and holds his model of the heliocentric system in a more ...