celestial mechanics

noun

the branch of astronomy that deals with the application of the laws of dynamics and Newton's law of gravitation to the motions of heavenly bodies.

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Origin:
1815–25

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Celestial mechanics is always a great word to know.

So is gobo. Does it mean:

a fool or simpleton; ninny.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

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Collins

World English Dictionary

celestial mechanics

—n
	the study of the motion of celestial bodies under the influence of gravitational fields

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Science Dictionary

celestial mechanics
The science of the motion of celestial bodies under the influence of gravitational forces. See more at Kepler's laws of planetary motion , relativity.

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