Eclipses and Gravity
Eclipses and Gravity AST 101 - M001
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AST 101 - M001
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This 2 page Class Notes was uploaded by Mitchell Jones on Sunday October 11, 2015. The Class Notes belongs to AST 101 - M001 at Syracuse University taught by C. Armendariz-Picon in Fall 2015. Since its upload, it has received 35 views. For similar materials see Our Corner of the Universe in Astronomy at Syracuse University.
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Date Created: 10/11/15
Eclipses Lunar eclipse earth casts a shadow on the moon Must be a full moon Total lunar eclipse moon is entirely in shadow Partial lunar eclipse part of moon in shadow Penumbral lunar eclipse moon passes through the penumbra secondary shadow Solar eclipse moon casts shadow on earth can t see the sun Total in umbra main shadow Partial occurs in penumbra Annular if moon s shadow does not reach earth an annular eclipse occurs in small central region on earth Doesn t occur all over earth only in specific region Predicting eclipses proves that our model of the solar system is accurate Force of Gravity Describing motion Position location of object Velocity speed with respect to direction and how position changes Acceleration speed that velocity changes and in what direction Planets accelerate as they orbit because they constantly change direction going in an ellipse but remain at constant speed Newton s Laws of Motion 1 In the absence of a net force an object will move with a constant velocity 2 Acceleration experienced by an object is proportional to the force acting on it Fma 3 For every action there is an equal and opposite reaction Gravity Force responsible for keeping celestial bodies in orbit Keeps us on surface of the earth Explains evolution of whole universe Laws of nature are universal Universal law of gravitation Tells us the strength of gravity between two objects FgGM1M2dquot2 Ddistance between two objects Mmass of objects 1 and 2 Ggravity constant Greater distance smaller gravitational force
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