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Bringing Our Solar System to Life Grade 5 Overview Since the Solar
Bringing Our Solar System to Life Grade 5 Overview Since the Solar

... 2. Once everyone has gotten to the site, play the YouTube video about outer space in the top popple. 3. Write the definition of “revolution” on the board as the motion of planets traveling around the sun in a roughly circular path (1 planetary year) and the definition of “rotation” as the spinning m ...
Celestial Equator - University of Maryland Astronomy
Celestial Equator - University of Maryland Astronomy

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... Back to the impact debris. Some of the matter fell back to Earth in the usual way. But some of the matter that ew out in a straight line had its path altered by the force due to Earth’’s gravity. Take a rock the size of a trash can as an example. It ew off in a straight line like that shown on the ...
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Astronomy 8 - Dallas ISD

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Astronomy - Dallas ISD
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... The diameter of the Earth is about 8,000 miles, and the diameter of the Moon is about 2,000 miles. The distance from the Earth to the Moon is about 240,000 miles. If a volley ball (diameter of about 8 inches) and a tennis ball (diameter of about 2 inches) are used to make a scale model of the Earth- ...
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Lecture notes - University of Wyoming
Lecture notes - University of Wyoming

... could change the temp enuf to cause ice ages. End of 1800s after much success fell into disfavor – the alternating hemispheric glaciation could not be found in the evidence. Further work had to wait to the 1900s, Milutin Milankovitch searching for a problem to be tackled mathematically came upon Cro ...
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Geocentric model



In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a description of the cosmos where Earth is at the orbital center of all celestial bodies. This model served as the predominant cosmological system in many ancient civilizations such as ancient Greece including the noteworthy systems of Aristotle (see Aristotelian physics) and Ptolemy. As such, they believed that the Sun, Moon, stars, and naked eye planets circled Earth.Two commonly made observations supported the idea that Earth was the center of the Universe. The stars, the sun, and planets appear to revolve around Earth each day, making Earth the center of that system. The stars were thought to be on a celestial sphere, with the earth at its center, that rotated each day, using a line through the north and south pole as an axis. The stars closest to the equator appeared to rise and fall the greatest distance, but each star circled back to its rising point each day. The second observation supporting the geocentric model was that the Earth does not seem to move from the perspective of an Earth-bound observer, and that it is solid, stable, and unmoving.Ancient Roman and medieval philosophers usually combined the geocentric model with a spherical Earth. It is not the same as the older flat Earth model implied in some mythology, as was the case with the biblical and postbiblical Latin cosmology. The ancient Jewish Babylonian uranography pictured a flat Earth with a dome-shaped rigid canopy named firmament placed over it. (רקיע- rāqîa').However, the ancient Greeks believed that the motions of the planets were circular and not elliptical, a view that was not challenged in Western culture until the 17th century through the synthesis of theories by Copernicus and Kepler.The astronomical predictions of Ptolemy's geocentric model were used to prepare astrological and astronomical charts for over 1500 years. The geocentric model held sway into the early modern age, but from the late 16th century onward was gradually superseded by the heliocentric model of Copernicus, Galileo and Kepler. There was much resistance to the transition between these two theories. Christian theologians were reluctant to reject a theory that agreed with Bible passages (e.g. ""Sun, stand you still upon Gibeon"", Joshua 10:12 – King James 2000 Bible). Others felt a new, unknown theory could not subvert an accepted consensus for geocentrism.
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