yes they are very related
Galileo did not have his own theory. He was a supporter of Copernicus's heliocentric theory and an opponent of the geocentric Ptolemaic theory. Eventually both theories were rejected in favour of Kepler's theory. But Kepler's theory uses the heliocentric idea from Copernicus's theory.
Sir Issac Newton
Aristarchus of Samos
Isaac Newton.
Nicolaus Copernicus (1473 -- 1543) is a famous Polish Astronomer.
Copernicus proposed the theory of a heliocentric model while Galileo improved the telescope, studied Jupiter's moons, and supported the heliocentric model
Galileo
Newton explained his theory
Galileo did not have his own theory. He was a supporter of Copernicus's heliocentric theory and an opponent of the geocentric Ptolemaic theory. Eventually both theories were rejected in favour of Kepler's theory. But Kepler's theory uses the heliocentric idea from Copernicus's theory.
Sir Issac Newton
Aristarchus of Samos
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.
Isaac Newton.
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.