Physics

answer the following physics questions

1 (A survey of the sky ) What must be your location if the stars move across the sky in circles centered directly overhead

Answer : You must be at the North Pole . Directly overhead of the North Pole hovers Polaris . As the Earth rotates around its axis , the stars revolve counterclockwise around Polaris . Each star traces a concentric circle around the central point exactly overhead (1

2 (The Copernican system ) What is the basic difference between the Ptolemaic and Copernican models ? Why is the Ptolemaic model considered

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Answer : Copernicus was a Polish astronomer and mathematician who was a proponent of the view of an Earth in daily motion about its axis and in yearly motion around a stationary sun . This theory profoundly altered later workers ' view of the universe , but was rejected by the Catholic Church (2

Ptolemy like Aristotle believed that the earth was the center of the universe . He believed the Earth was fixed and around which a sphere of fixed stars rotates every day , including the sun , moon and all of the other planets . Using a telescope , Galileo proved that Copernicus was correct about the sun being the center of the universe with Earth and all other planets revolving around it

3 (The Copernican system ) Ancient astronomers were troubled by variations in the brightness of the various planets with time . Does the Ptolemaic or the Copernican model account better for these variations

Answer : The Copernican model better explains these variations than...