Galileo
Newton's greatest achievements are the Law of Gravity, his laws of Motion, his development of Calculus, the Reflecting Telescope, his Theory of Light and his use of data, experiments and mathematical models.
Geocentric models had the earth as the center of the universe with the sun and all the planets orbiting it. Heliocentric models (the current accepted ones) have the sun as the center, with the earth and planets orbiting it.
The planets Uranus and Neptune were discovered only in modern times after the heliocentric model had been generally accepted.
He created the 'Ptolemaic System' which was a widely accepted geocentric model until the introduction of the more simple heliocentric models. He came up with the value of Pi (3.14166). He wrote several Astrology books including the 'Almagest' which is the only surviving comprehensive ancient treatise on astronomy.
in a heliocentric system earth and the other planets revolving planet's a geocentric system ,earth is at the center of the revolving planets
New scientific models are developed in order to reflect the most recent discoveries.
It was the model devised by Copernicus.
Nicolaus Copernicus.
Well if we didn't have any models and so we would not have any models
Models are designed to serve particular purposes. In the case of astronomical models, they are designed to explain how things in the sky behave. For this purpose, heliocentric models are superior, because they are a closer description of what actually happens than geocentric models. They aren't ENTIRELY accurate, but close enough. However, if your purpose is to navigate on the surface of the Earth using a sextant, geocentric models are almost as accurate and make it a WHOLE lot easier to do the math. (I used to be an instructor in the US Air Force's celestial navigation school.)
True
He improved the recently invented telescope to see into space, he discovered Jupiter's moons and Saturn's rings. He observed how Jupiter's moons orbited around it and this convinced him that the Copernicus's Heliocentric model (model of planets orbiting around the sun rather than the earth) was correct. Galileo published these ideas and was put on trial for supporting the heliocentric models and going against the Roman Catholic Church's beliefs. He avoided execution but spent the rest of his life under house arrest.