Newton derived Keplars findings from Newton's Theory of Gravity. Thus, newton 'explained' the basis for Keplars findings and extended them.
He figured out that all three laws - i.e., the elliptical orbits, the changing speeds, and the relative speeds of the different planets - could be explained perfectly with an inverse-square law for gravity, but not for any other law (for example, not by an 1/x (simple inverse) law, or an inverse-cube law).
He discovered the dependence on mass in the third law
Newton used Keplers laws to verify his Theory of Gravity, by deriving Keplers laws from his Theory.
The circular orbits that were being used at the time to model the solar system did not quite work with mathematical predictions or observations. Kepler found that elliptical orbits provided more accurate predictions of where the heavenly bodies would appear in the sky.
Johannes Kepler was the first person to prove that all of the planets are in elliptical orbits, but he was unable to propose any mechanism that would cause this. Based largely on Kepler's work, Isaac Newton was able to invent the calculus of infinitesimals and to propose his law of universal gravitation, providing a mechanism that would cause the planets to behave in accordance with Kepler's laws. Newton's later comment "If I have seen further than other men, it is because I have stood on the shoulders of giants" was in direct reference to Kepler's essential contributions.
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There are no fundamental laws behind the Copernican theory. The three laws of planetary motion that we use now were discovered by Johannes Kepler and published in 1609, sixty-six years after Copernicus died.Kepler introduced the new idea of elliptical orbits. The idea that the Sun is at the centre (loosely speaking) was the only part of the Copernican theory that Kepler retained.
Newton derived Keplars findings from Newton's Theory of Gravity. Thus, newton 'explained' the basis for Keplars findings and extended them.
His work on planetary orbits.
No, Johannes Kepler is best known for describing the laws that dictate how orbits work. The Kepler planets were discovered by the Kepler telescope, a spacecraft named in his honor.
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
All orbits are ellipses, a sort of oval. Kepler's laws didn't give people enough information to actually calculate an orbit, but his work was fundamental to Isaac newton's work in developing theories of gravity and developing calculus.
That was the work of Kepler, resulting in his Laws of Planetary Motion.
The answer is newtons
Kepler discovered that the planets move in elliptical orbits and he published three laws of planetary motion that explained the details of the ellipses. Kepler's work used observations done by Tycho Brahe, and subsequent observations confirmed that Kepler's laws were correct (they still are). No-one knew why until the later discoveries of the laws of motion and the laws of gravity about 70 years later.
The circular orbits that were being used at the time to model the solar system did not quite work with mathematical predictions or observations. Kepler found that elliptical orbits provided more accurate predictions of where the heavenly bodies would appear in the sky.
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
Kepler studied the planets' orbits and published his three laws of planetary motion, in 1609 and 1619. His most famous work was probably the 1609 book called "Astronomia Nova".