Galileo's greatest contribution to physics (after the notion of doing experiments at all) was his studies of the motions of objects.
He rolled balls down an inclined plane to "slow down" their falling and study it.
In this re-creation, the plane is equipped with bells arranged so they would ring as the balls passed..
Galileo believed that what he saw through his telescope was real and that the Copernican model was not just instrumentally useful, but a true description of a universe governed by real unseen forces and laws..
Galileo Galilei (1564-1642) was part of a small group of astronomers who turned telescopes towards the heavens.
After hearing about the "Danish perspective glass" in 1609, Galileo constructed his own telescope.
He subsequently demonstrated the telescope in Venice..
He discovered that the sun has sunspots, which appear to be dark in color.
Galileo's discoveries about the Moon, Jupiter's moons, Venus, and sunspots supported the idea that the Sun - not the Earth - was the center of the Universe, as was commonly believed at the time..
The Italian astronomer argued that Earth and other planets revolve around the sun..
Galileo believed that an object in uniform motion will travel a distance that is proportional to the time it took to travel; a uniformly accelerating object will travel with a speed proportional to some factor of time; and an object in motion, if unimpeded, will continue to be in motion; an external force is not .
Galileo believed that what he saw through his telescope was real and that the Copernican model was not just instrumentally useful, but a true description of a universe governed by real unseen forces and laws..
In 1616 the Catholic Church placed Nicholas Copernicus’s “De Revolutionibus,” the first modern scientific argument for a heliocentric (sun-centered) universe, on its index of banned books.
Pope Paul V summoned Galileo to Rome and told him he could no longer support Copernicus publicly.
In 1632 Galileo published his “Dialogue Concerning the Two Chie.
In 1609 Galileo built his first telescope, improving upon a Dutch design.
In January of 1610 he discovered four new “stars” orbiting Jupiter—the planet’s four largest moons.
He quickly published a short treatise outlining his discoveries, “Siderius Nuncius” (“The Starry Messenger”), which also contained observations of the moon’s surface and descri.
Galileo Galilei was born in Pisa in 1564, the first of six children of Vincenzo Galilei, a musician and scholar.
In 1581 he entered the University of Pisa at age 16 to study medicine, but was soon sidetracked by mathematics.
He left without finishing his degree.
In 1583 he made his first important discovery, describing the rules that govern the mot.
Galileo’s observations contradicted the Aristotelian view of the universe, then widely accepted by both scientists and theologians.
The moon’s rugged surface went against the idea of heavenly perfection, and the orbits of the Medician stars violated the geocentric notion that the heavens revolved around Earth.
Galileo Galilei (1564-1642) is considered the father of modern science and made major contributions to the fields of physics, astronomy, cosmology, mathematics and philosophy.
Galileo Galilei:
The story of Galileo's telescopic observations illustrates how a tool for seeing and collecting evidence can dramatically change our understanding of the cosmos.
Early telescopes were primarily used for making Earth-bound observations, such as:
