Nicolaus Copernicus's scientific ideas regarding the universe and specifically the idea of heliocentrism were at odds with the generally accepted ideas of his time. It was difficult for people to accept these new ideas, made even more difficult by the Catholic Church's powerful opposition to them for some time.
Galileo had such a hard time showing his theories on the universe to the people because if he showed his opinion or said it he would be put in house arrest.
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Arguably, Copernicus' biggest obstacle was the church. The church supported the Ptolemaic view that the universe consisted of 10 concentric spheres with Earth at the center and heaven outside. Questioning this philosophy meant upsetting the church, which had the authority to capture Copernicus. He thus kept the idea of heaven outside the universe, but made a heliocentric conception nonetheless.
Aristarchus of Samos
yes they are very related
Nicolaus Copernicus (1473 -- 1543) is a famous Polish Astronomer.
Actually, no one challenged his theory. In fact the next real astronomer, to even come back to his theory was Galileo, who came around fifty years later. There were absolutely no challenges to his theory, but between the fifty years of Copernicus's death, and Galileo proving Copernicus right, his theory was shunned, and the church passed a law that saying his name was illegal.
Copernicus was worried that his mathematical model of the solar system went against christianity, as he was a devout christian. It is for this reason that he did not publish his model until he was on his deathbed, and is partially the reason for Galileo being placed under house arrest. Copernicus was so worried about this that in several parts of his paper, he reconciled his theory with the views of the church.
Galileo
Aristarchus of Samos
yes they are very related
He knew that the church would oppose his theories.
Copernicus was in 1543, a polish astronomer named Nicolaus Copernicus. Copernicus's theory - The sun is at the center of the Universe. Galileo Galilei was in 1609, Galileo became the first person to use a telescope to observe celestial bodies.
Contrary to most people of the 14th Century, Copernicus believed that the Earth revolved around the sun. Galileo later proved Copernicus' theory to be correct.
The discovery did not support Copernicus's theory directly but it raised doubts about the ancient theory of Ptolemy that said that all objects in the sky are in orbit round the Earth. Galileo was an aggressive supporter of Copernicus's theory but eventually it was Kepler's theory that became accepted and is still used today. Both Copernicus and Kepler placed the Sun at the centre but Kepler's elliptical orbits are supported by the later theory of dynamics.
Nicolaus Copernicus (1473 -- 1543) is a famous Polish Astronomer.
Actually, no one challenged his theory. In fact the next real astronomer, to even come back to his theory was Galileo, who came around fifty years later. There were absolutely no challenges to his theory, but between the fifty years of Copernicus's death, and Galileo proving Copernicus right, his theory was shunned, and the church passed a law that saying his name was illegal.
Copernicus was worried that his mathematical model of the solar system went against christianity, as he was a devout christian. It is for this reason that he did not publish his model until he was on his deathbed, and is partially the reason for Galileo being placed under house arrest. Copernicus was so worried about this that in several parts of his paper, he reconciled his theory with the views of the church.
The two main proponents in the early days were Nicolas Copernicus and Galileo.
Galileo was allowed to publish his findings as theory, which was a major relaxation of Catholic doctrine. Instead, he published them as fact.