Both Uses

Galileo
in
Ulysses, by James Joyce
(Auto-generated)

But what I am anxious to arrive at is it is one thing for instance to invent those rays Rontgen did or the telescope like Edison, though I believe it was before his time Galileo was the man, I mean, and the same applies to the laws, for example, of a farreaching natural phenomenon such as electricity but it's a horse of quite another colour to say you believe in the existence of a supernatural God.†
Chpt 16 *

Galileo = Italian scientist who used the telescope to show that the Earth moves around the Sun
The various colours significant of various degrees of vitality (white, yellow, crimson, vermilion, cinnabar): their degrees of brilliancy: their magnitudes revealed up to and including the 7th: their positions: the waggoner's star: Walsingham way: the chariot of David: the annular cinctures of Saturn: the condensation of spiral nebulae into suns: the interdependent gyrations of double suns: the independent synchronous discoveries of Galileo, Simon Marius, Piazzi, Le Verrier, Herschel, Galle: the systematisations attempted by Bode and Kepler of cubes of distances and squares of times of revolution: the almost infinite compressibility of hirsute comets and their vast elliptical egressive and r†
Chpt 17

Definitions:

(1) (Galileo as in: Galileo Galilei)
Italian scientist who used the telescope to study the heavens and helped show that the Earth moves around the Sun (1564-1642)

Galileo improved the telescope and used it to discover mountains on the Moon, moons orbiting Jupiter, and many stars too faint to see with the naked eye. In physics, he showed that objects of different weights fall at the same rate (ignoring air resistance) and studied motion on ramps and inclined planes. His support for the Copernican idea that Earth goes around the Sun brought him into conflict with Church authorities, and he was tried by the Inquisition and forced to recant, spending his later years under house arrest.
(2) (meaning too rare to warrant focus)