Back Field in Motion Bb

Back Field in Motion Bb - Back Field in Motion Lecture 5A...

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Back Field in Motion… Lecture 5A – 10/4/10 Tail Gate Party #1 (a.k.a Exam #1 Review Session) during class on Oct.6 th . Announcement: Models of the Solar System, Gravitation and the motion of the Planets – A.K.A. REALLY OLD DEAD GUYS WEEK! NEWS FLASH!!! The Moon is spiraling away from Earth @ a rate of 3.8 cm per year!!!
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Cosmogony A cosmogony is theory about ones place in the universe. A geocentric cosmogony is a theory that proposes Earth to be at the center of the universe. A heliocentric cosmogony is a theory that proposes the Sun to be at the center of the universe. Which is the geocentric cosmogony and which is the heliocentric cosmogony? geocentric (Earth centered) heliocentric (Sun centered) Pythagorean Universe time: about 550 bc first recorded attempt at rational explanation of heavens formed foundation for Greek astronomy
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Philosophical Ideas The heavens represent perfection. The heavens are immutable. The circle is the perfect shape. All heavenly motions must be circular. Pythagorean Model stars reside on stellar sphere stellar sphere rotates about axis in 23 hours 56 minutes Sun follows path called ecliptic going around Earth once in one year accounts for most observations!! BUT
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Back Field in Motion Bb - Back Field in Motion Lecture 5A...

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