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Powerpoint
Powerpoint

... (356-323 BC) • Much of the knowledge of the world came together as the rule of Alexander spread across Europe, Asia, and Northern Africa. • Founded the city of Alexandria • Library of Alexandria contained the written works and inventions of many great thinkers and scientists. ...
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... from N to S poles in one day. The axis of rotation is inclined at 23.5O with respect to the axis of revolution. The intersection of the line from Earth center through N or S pole with celestial sphere are the Celestial poles. The projection of the earth’s equator (the plane perpendicular to the pola ...
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Lunar theory

Lunar theory attempts to account for the motions of the Moon. There are many irregularities (or perturbations) in the Moon's motion, and many attempts have been made to account for them. After centuries of being problematic, lunar motion is now modeled to a very high degree of accuracy (see section Modern developments).Lunar theory includes: the background of general theory; including mathematical techniques used to analyze the Moon's motion and to generate formulae and algorithms for predicting its movements; and also quantitative formulae, algorithms, and geometrical diagrams that may be used to compute the Moon's position for a given time; often by the help of tables based on the algorithms.Lunar theory has a history of over 2000 years of investigation. Its more modern developments have been used over the last three centuries for fundamental scientific and technological purposes, and are still being used in that way.
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