Star and galaxies

Jun 17th, 2015
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Aristotle: He believed that the Earth was at the centre of the universe and that the Sun, the Moon and the visible planets, as well as a celestial sphere containing all the stars, revolved around the Earth. However, he had no technology with which to examine the heavens, other than his naked eye. This was known as the geocentric model.

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1. Our Sun is just one star in the galaxy and ours is just one galaxy in the Universe.Outline the historical development of models of the Universe from the time of Aristotle to the time of Newton.NEED TO FOCUS ON ONE ASTRONOMER AND DESCRIBE HIS MODEL SPECIFICALLYAristotle: He believed that the Earth was at the centre of the universe and that the Sun, the Moon and the visible planets, as well as a celestial sphere containing all the stars, revolved around the Earth. However, he had no technology with which to examine the heavens, other than his naked eye. This was known as the geocentric model.Aristarchus: He disagreed with Aristotle and put forward an alternative view. He suggested that the Sun is much bigger than the Earth which therefore positions it at the centre of the universe in which the Earth orbits it. Also, he explained that Earth rotates on an axis once per day, producing the apparent motion of the Sun and stars. This was known as the heliocentric model. Nevertheless, people did not favour his idea over Aristotles model as his predictions were not sufficiently detailed.Ptolemy:He refined Aristotles geocentric model and was so elaborate that it successfully convinced the Roman church to be considered the correct model of the universe. With the support of the Roman church, this model predominated over all others for about 1400 years.Copernicus:He proposed that the Sun was stationary at the centre of the universe and that everything else revol

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