from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The science of the motion of celestial bodies under the influence of gravitational forces.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The dynamics of celestial bodies subject to mutual gravitational attraction.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the branch of astronomy concerned with the application of Newton's laws of motion to the motions of heavenly bodies
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