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PHYS103 Hour Exam No. 2 Page: 1 1 The time it takes for Jupiter to
PHYS103 Hour Exam No. 2 Page: 1 1 The time it takes for Jupiter to

... 4 Newton’s Universal Law of Gravity explains all but one of the following things: a. how objects fall on Earth. b. how lightning works. c. planetary motion. d. the motion of the Moon around the Earth. e. ocean tides. 5 Jupiter has the most mass of any planet in our Solar System and is also the large ...
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... behaves more like a star near the north celestial pole (more like a circumpolar star) – so it is above the horizon much more than 12 hours. ...
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... Young children are naturally interested in everything they see around them--soil, rocks, streams, rain, snow, clouds, rainbows, sun, moon, and stars. During the first years of school, they should be encouraged to observe closely the objects and materials in their environment, note their properties, ...
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... Key elements Used in This Book The Big Idea: Earth is part of a system of fast-moving objects in space. Earth rotates on its axis, Earth revolves around the Sun, and the Moon revolves around Earth. These movements affect important aspects of our daily lives, including night and day, our calendars, t ...
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Copernican heliocentrism



Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. It positioned the Sun near the center of the Universe, motionless, with Earth and the other planets rotating around it in circular paths modified by epicycles and at uniform speeds. The Copernican model departed from the Ptolemaic system that prevailed in Western culture for centuries, placing Earth at the center of the Universe, and is often regarded as the launching point to modern astronomy and the Scientific Revolution.Copernicus was aware that the ancient Greek Aristarchus had already proposed a heliocentric theory, and cited him as a proponent of it in a reference that was deleted before publication, but there is no evidence that Copernicus had knowledge of, or access to, the specific details of Aristarchus' theory. Although he had circulated an outline of his own heliocentric theory to colleagues sometime before 1514, he did not decide to publish it until he was urged to do so late in his life by his pupil Rheticus. Copernicus's challenge was to present a practical alternative to the Ptolemaic model by more elegantly and accurately determining the length of a solar year while preserving the metaphysical implications of a mathematically ordered cosmos. Thus his heliocentric model retained several of the Ptolemaic elements causing the inaccuracies, such as the planets' circular orbits, epicycles, and uniform speeds, while at the same time re-introducing such innovations as,Earth is one of several planets revolving around a stationary Sun in a determined orderEarth has three motions: daily rotation, annual revolution, and annual tilting of its axisRetrograde motion of the planets is explained by Earth's motionDistance from Earth to the Sun is small compared to the distance to the stars.↑ 1.0 1.1 ↑
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