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Q: What did Copernicus proposed in 1543 that contradicted the Greek theory?
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What was the name of the Scientist who proposed the Helicentric Model?

The earliest known proposal that the Sun was at the center of our solar system while the planets moved around it was by Aristarchus of Samos, a Greek mathematician and astronomer who lived in the 3rd century BC. (Others may have proposed it earlier, but no reference to them remains after 2400 years.) However, the views of Aristotle proved easier to accept. It wasn't until Copernicus developed the same theory (probably independently) based on more accurate and complete observational data that the heliocentric view of the solar system was widely accepted.


Why scientists accepted daltons atomic theory but not the idea of an atom proposed by the Greek philosopher?

the Greek Philosophers did not test their theory.


Whose Atomic theory states that atoms are featureless and solid?

That was the earliest version of atomic theory, proposed by the Greek philosopher Democritus.Democritus


From which country was the person that suggested that the sun was at the center of the solar system?

Copernicus proposed a sun centered solar system Galileo supported his belief.


What scientist said the earth moves around the sun?

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.


Who was the polish astronomer who suggested the sun was in the center if the universe?

Nicolaus Copernicus, in 1543 , proposed his version of the heliocentric (Sun-centered) organization of the universe.(from De revolutionibus orbium coelestium)Finally we shall place the Sun himself at the center of the Universe.All this is suggested by the systematic procession of events andthe harmony of the whole Universe, if only we face the facts,as they say, 'with both eyes open'.


Who reinvented or rediscovered the heliocentric theory?

The original idea (at least, the earliest of which we're aware) that the Earth circled the Sun was proposed by Aristarchus of Samos, a Greek astronomer and mathematician. But the Aristotle's idea that the Sun circled the Earth was more "obviously apparent" and became accepted as fact. The reintroduction of the heliocentric theory by Copernicus, supported by more accurate celestial observations, came almost 1700 years later.


When did they came up the theory of atoms?

The pre-modern idea of atomic theory was proposed by Greek thinkers like Democritus, Leucippus, and the Epicureans, which would have been at about 500 to 300 BC.


How did people know that everything revolves around the sun?

Aristarchus of Samos (circa. 300- 250BC), a Greek Astronomer and Mathematician is belived to be the first astronomer who proposed that sun is the center of the universe (Heliocentric). but the idea did not begin to gain general acceptance until it was proposed by Nicolaus Copernicus 1543.


Who was Nicholas Copernicus and how did he change astronomy?

Copernicus is famous as the first scientist to re-examine the theory of the planets and how they move among the stars. He produced a new theory explaining how the planets move around, published in 1543. It raised questions about the ancient theory of Ptolemy, who had said the Earth was at the centre of the universe. Copernicus realised that the motions of the planets were better explained by putting the Sun at the centre with all the planets going round it. This is known as the heliocentric hypothesis. The theory was eventually discarded in favour of Kepler's theory of 1609, but Copernicus has the credit for starting the ball rolling and encouraging people to think about the problem.


Which scientists described the universe and what were their theories?

Claudius Ptolemy and Nicolaus Copernicus both described the universe. Ptolemy, a Greek astronomer, wrote a book that combined all knowledge of astronomy that he could find. He expanded ancient theories with careful mathematical calculations in what was called the Ptolemaic Theory. Ptolemy thought the Earth was the center of the Universe and that the sun and other planets revolved around Earth. Although this theory was incorrect as we now know, it predicted motions of the planets better than any other theory at the time did. Copernicus, a Polish astronomer, published a new theory that would eventually revolutionize astronomy. Copernicus thought the Sun was the center of the universe, and all the planets (including Earth) orbit the sun. Although Copernicus correctly thought that the planets orbit the sun, his theory did not replace Ptolemaic theory immediately. When Copernicus's theory was accepted, major changes in science and society called the Copernican revolution took place.


When did the model of the solar system have sugested the sun in the middle of it?

The ancient Greek, Aristarchus, first suggested the sun-centered system. However, his teachings were largely ignored - perhaps because Aristotle, the teacher of Alexander the Great, favored an Earth-centered system. Copernicus, in 1543, published a book on his deathbed supporting the sun-centered theory. "On the Revolutions of the Heavenly Orbs" contradicted the teachings of the church and literally "revolutionized" our view of the world.