**Celestial mechanics** is the branch of astronomy that deals with the motions of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. Orbital mechanics (astrodynamics) is a subfield which focuses on the orbits of artificial satellites. Lunar theory is another subfield focusing on the orbit of the Moon.

Read more about Celestial Mechanics: History of Celestial Mechanics, Examples of Problems, Perturbation Theory

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**celestial mechanics**were irreconcilable with Newtonian

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... with the otherwise unsolveable mathematical problems of

**celestial mechanics**Newton's solution for the orbit of the Moon, which moves noticeably differently from a ... In

**celestial mechanics**, this is usually a Keplerian ellipse, which is correct when there are only two gravitating bodies (say, the Earth and the Moon), or a circular orbit, which ...

### Famous quotes containing the words mechanics and/or celestial:

“It is only the impossible that is possible for God. He has given over the possible to the *mechanics* of matter and the autonomy of his creatures.”

—Simone Weil (1909–1943)

“It would be well, perhaps, if we were to spend more of our days and nights without any obstruction between us and the *celestial* bodies.... Birds do not sing in caves, nor do doves cherish their innocence in dovecots.”

—Henry David Thoreau (1817–1862)