Heliocentrism Quotes (10 quotes)
Copernicus and Galileo: A Scientific Revolution
The heliocentric model
The heliocentric theory argues that the sun is the central body of the solar system and perhaps of the universe. Everything else planets and their satellites, asteroids, comets, etc. The first evidence of the theory is found in the writings of ancient Greek philosopher-scientists. Only a round body can always cast such a shadow. Despite this discovery, the prevailing theory at that time was that of a geocentric Earth-centered universe, in which all celestial bodies were believed torevolve around Earth.
Heliocentrism [a] is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System. Historically, heliocentrism was opposed to geocentrism , which placed the Earth at the center. The notion that the Earth revolves around the Sun had been proposed as early as the 3rd century BC by Aristarchus of Samos ,  but at least in the medieval world, Aristarchus's heliocentrism attracted little attention—possibly because of the loss of scientific works of the Hellenistic Era. It was not until the 16th century that a mathematical model of a heliocentric system was presented , by the Renaissance mathematician, astronomer, and Catholic cleric Nicolaus Copernicus , leading to the Copernican Revolution. In the following century, Johannes Kepler introduced elliptical orbits , and Galileo Galilei presented supporting observations made using a telescope. With the observations of William Herschel , Friedrich Bessel , and other astronomers, it was realized that the Sun, while near the barycenter of the Solar System, was not at any center of the universe. While the sphericity of the Earth was widely recognized in Greco-Roman astronomy from at least the 4th century BC,  the Earth's daily rotation and yearly orbit around the Sun was never universally accepted until the Copernican Revolution.
Jul 7, Galileo discovered evidence to support Copernicus' heliocentric theory when he observed four moons in orbit around Jupiter. Beginning on.
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Galileo Galilei, who first incurred the Roman Catholic Church's wrath on March 5, , when he was ordered neither to "hold nor defend" the Copernican theory, did not prove the theory by his observations of satellites circling the planet Jupiter, as you report in "After years, Vatican Says Galileo Was Right: It Moves" front page, Oct. Instead, Galileo disproved the Ptolemaic theory, sanctioned for centuries by the Church, which held the Earth to be the central and principal object in the universe, about which all celestial objects orbited. By default, the Copernican theory of planets including Earth orbiting the Sun was the only credible one remaining. The Church's belated removal of its condemnation of Galileo comes years, 7 months and 26 days after the decree that attempted to intimidate and restrict the great scientist. Actually, Copernicus did not discover the movements of the planets about the Sun.