celestial mechanics definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the branch of astronomy that deals with the motion and positions of celestial objects in orbit
celestial mechanics definition by American Heritage Dictionary
noun (used with a sing. verb)The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The science of the motion of celestial bodies under the influence of gravitational forces.