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01-Syllabus
01-Syllabus

... short- answer, and essay questions. If you miss an exam, see the professor. All makeups are given on the same day. Date, time and place to be determined. Exam scores will be posted by your course and ID# on the web. If you feel there’s a mistake on the multiple-choice part of an exam, please see the ...
Atoms and Stars IST 3360 and IST 1990
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... Slide 36 from Class 3 • Hellenistic Period (after 323 BC) o Ptolemy (2nd cent AD) used new tools to simplify geocentric model of heavens • Epicycle (small sphere moved on larger sphere, planet on small sphere) • Eccentrics (circle displaced from earth) • Equant – point from which planet appeared to ...
ASTRONOMY 301 EXAMPLES OF TEST
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Unit 8 Chapter 28 Minor Bodies of the Solar System
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The Night Sky This Month - Usk Astronomical Society
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... The Uniglobe is a WORLD GLOBE immediately surrounded by a transparent CELESTIAL GLOBE upon which are marked the stars and other pertinent celestial data. The two globes are supported by a YOKE MOUNT which rests in a slotted BASE for orienting the AXIS toward any direction. A braking system allows th ...
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Astronews - Hawaiian Astronomical Society
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... Meteor showers are produced by dust and sand-sized particles from comets and asteroids that collide with the Earth’s atmosphere as it travels in its orbit. Occasionally a pebble or boulder-sized object is swept up and we are treated to a bolide or fireball. More rarely, a large object finds its way ...
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... • (If the objects are comparable in size, it’s usually called an “eclipse” instead) • As the moon moves through it’s orbit, it passes in front of distant stars or planets. This essentially casts a shadow on the Earth and from within this shadow, you can watch the star approach the moon and wink off ...
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... and Hesperus (evening star) ◗ Venus is the 3rd brightest object in the sky (besides sun & moon) ◗ Because Venus is an inferior planet (between us and moon), it has phases as Galileo observed ...
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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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