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Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects, and many of these motions can be computed in real time, for past, present and future, using Wolfram|Alpha. These motions can be the result of the daily rotation of the Earth, the annual motion of the Earth around the Sun, the true motion of these objects with respect to each other or any combination of these motions. Celestial mechanics equations can be used to derive solutions to various problems using the concepts of orbital elements, mass and rotation period, among many other parameters.

Tackle problems in celestial mechanics by specifying formulas by name or by specifying known variables and parameters to solve for.