He didn't know it, he just brought out a new theory that showed that with the Sun at the centre the planets' paths could be explained more simply.
That was in 1543 and Kepler produced another heliocentric theory in 1609 which had the planets moving in elliptical orbits round the Sun.
The only thing in favour of Kepler's theory at the time was that it explained the planets' positions more accurately than previous theories. But 80-90 years later Newton's discoveries in gravity and the laws of motion were used to prove by theory that the planets must move in elliptical orbits.
The astronomical telescope.
Ptolemy thought that the Earth was the center of solar system and most people believed this theory. But Copernicus thought that the Sun was the center of solar system and most people didn't believed this theory. Who was right? Copernicus was right because later Galileo prove that if the Earth was at the center then he couldn't see the phases of Venus. Sentences for heliocentric. Galileo proved that the Copernicus's theory which was heliocentric was right.
Galileo did not prove that Earth was not flat (It had already been agreed that it was round). Galileo invented the telescope and used it to prove that there were objects which did not orbit the Earth, supporting Copernicus' Heliocentric model for the universe. The Earth was known to be round by the ancient Greeks, but I do not who it found out initially (sorry).
It was Copernicus who produced a detailed theory showing planets orbiting the Sun.However he didn't prove his theory.The proof came later through the work of Kepler, Galileo, and Newton.I would say that Galileo's work was the first evidence that could be called "proof".
Copernicus produced his model with the Sun at the centre in 1543, and then in 1609 Kepler produced the model that we use now. Kepler's model also uses the idea of having the Sun at the centre. No-one proved anything but after Newton's discoveries in physics it was realised that Kepler's model fitted exactly with Newton's later theories in gravity and dynamics, so that's why it became accepted, and it still is.
Nicolas Copernicus did not use a telescope, the use of the telescope to study the solar system was not done until over 50 years later by Galileo.
Copernicus created the mathematical theory to prove that the Sun, not the Earth, was the centre of our solar system. Galilei provided the calculations and observations to prove Copernicus' theory.
The astronomical telescope.
Ptolemy thought that the Earth was the center of solar system and most people believed this theory. But Copernicus thought that the Sun was the center of solar system and most people didn't believed this theory. Who was right? Copernicus was right because later Galileo prove that if the Earth was at the center then he couldn't see the phases of Venus. Sentences for heliocentric. Galileo proved that the Copernicus's theory which was heliocentric was right.
Newton explained his theory
Copernicus is the first in modern times, but he may have been basing his theory on the work of an earlier Greek Natural Philosopher. Galileo used a telescope and mathematics to prove Copernicus' hypothesis.
Galelei derived his theory from Copernicus. To Copernicus it was just a theory. Galilei managed to prove it when he invented the telescope and was able to see the moons orbiting Jupiter.
The only part of Copernicus's theory that Kepler retained was the idea that the Sun is at the centre of the Solar System.
because before Copernicus there was not much technology and later on in time there was more discoveries of existence of technology. which means people were able to prove his ideas. <3 <<>> Copernicus had a theory of the way the planets move around that had some advantages over the older Ptolemaic system which had the Earth at the centre. Copernicus had the Sun at the centre, which caused problems with the church when Galileo took the theory up and promoted it as the truth. Tycho Brahe also produced a system with the Earth at the centre. Tycho's system removed some of the faults in the Ptolemaic theory, specifically the full range of Venus's phases. Finally, the theory that lasted until modern times was that of Johannes Kepler (1609). He used the new idea of elliptical orbits, and also followed Copernicus in placing the Sun at the centre. Kepler's theory was generally accepted after Newton's expanation of elliptical orbits in terms of the theory of gravity.
galileo
Galileo was the first scientist to use a telescope to make discoveries about the Sun, Moon and planets. His discoveries raised serious doubts about the ancient Ptolemaic theory in which the Earth is at the centre of the Universe. Copernicus's theory of 1543 places the Sun at the centre instead. It explains some of the things that the Ptolemaic theory fails to explain, like the full range of Venus's phases that Galielo discovered. Galileo reasoned that this must prove that Copernicus's theory is right. However Galileo was wrong about this because Tycho Brahe's model explains the phases of Venus correctly yet still has the Earth at the centre. In the end, all these theories were rejected when Johannes Kepler produced his new theory in which the planets travel in elliptical orbits. It was generally accepted later, after Newton's discoveries showed theoretically that the planets must move in elliptical orbits under the force of gravity. However, Kepler's theory did have the Sun at the centre, so in one respect Copernicus was right.
Galileo did not prove that Earth was not flat (It had already been agreed that it was round). Galileo invented the telescope and used it to prove that there were objects which did not orbit the Earth, supporting Copernicus' Heliocentric model for the universe. The Earth was known to be round by the ancient Greeks, but I do not who it found out initially (sorry).