Astronmy Essay Example | Topics and Well Written Essays - 500 words

Astronmy - Essay ExampleThe planets surface to be varying in brightness since they be non always at the same maintain from the earthly concernEarth have-to doe with universe was proposed by ancient Greek philosophers, Aristotle and Ptolemy. All heavenly bodies are attached to 56 concentric spheres which rotate somewhat the Earth. In their superseded theory of geocentric model, they assumed that earth is at the centre of universe and tout ensemble planets and stars give care sun revolves around the earth. The Greeks were also believed that the motion of the planets were pear-shaped and not elliptical. They also believed that the stars were circling around the poles and the stars near the equator ascending and setting each day and circling back to their rising point.Polish astronomer Nicolas Copernicus was the first who put forward the sun centered universe theory which is cognize as heliocentric theory in the 1514. This theory assumes sun at the centre of the universe and all other planets revolving around it except moon. He was successful in predicting the earths third holding in the solar system. He also believed that the shape of the orbit in which the planets revolving around the sun is not exactly circular. Sometimes Mars went forward, other times it slowed down or went backwards. If the planets all revolved around the Earth, why didnt Mars orbit in a uniform way? (Dean Regas) This idea actually questi iodined the genuineness of earth centered universe model and encouraged Copernicus to formulate his famous heliocentric theory.Earth centered universe concept was an ancient theory formulated mainly by some Greek philosophers like Aristotle, Ptolemy, Plato etc. Observations seem to reinforce this view. The Sun rises in the east and sets in the west. Stars in the north revolve counterclockwise around the North Star. And the Earth appears to be the only thing that doesnt move. (Dean Regas) They argued that if the earth did move, then one