heliocentric theory
Copernicus proposed the theory of a heliocentric model while Galileo improved the telescope, studied Jupiter's moons, and supported the heliocentric model
Galileo Galilei . He only helped support the theory through his observations , he didn't invent the model, Copernicus did.
He thought of and supported the heliocentric model, which states the "heavens" revolve around the Sun.
Because he was the first astronomer in modern times to devise a new model of the planets' orbits with the Sun at the centre. Copernicus's model of 1543 was rejected after Kepler's theory of 1609 was supported by later theories of dynamics, but Kepler retained the heliocentric principle and Copernicus's work was an important stage in the process of development of ideas.
No Nicolaus Copernicus created it (although the planet's orbits were perfect circles in his model). Isaac Newton expanded on it. After Copernicus, Johannes Kepler stated that the orbits were elliptical. Isaac Newton came up with the theory of universal gravitation.
Nicolaus Copernicus.
The heliocentric model.
Nicholas Copernicus 1473-1543 was a Polish priest and astronomer who created an alternative model of the planets which put the Sun at the centre, instead of the Earth as generally accepted at that time.Kepler's model is the one we use today, and it has the Sun at the centre, like the Copernican model, but all the other details of Copernicus's theory were rejected in favour of elliptical orbits.
Nicolaus Copernicus
The problem was, he didn't just support Copernicus's idea, and he did not stick to teaching it as a theory, as the church allowed him to do. His problem was that he promoted it aggressively as the absolute truth, and that is what put him on a collision course with the Vatican. He was tried for heresy because he was held to be trying to reinterpret The Bible. Copernicus's theory, as promoted by Galileo, was eventually replaced by Kepler's theory, but the idea of having the Sun at the center was retained. In the 18th century the discovery of the law of gravity and the laws of motion showed that Kepler's model was very close to reality, and it's the model in use today with slight modifications from relativity.
Copernicus proposed it, Galileo fought for it. It is called the Heliocentric model.
Nicolaus Copernicus