celestial mechanics

Celestial mechanics is a division of astronomy dealing with the motions and gravitational effects of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. It is distinguished from astrodynamics, which is the study of the creation of artificial satellite orbits.
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Noun
1. the branch of astronomy concerned with the application of Newton's laws of motion to the motions of heavenly bodies
(hypernym) astronomy, uranology

Eng: celestial mechanics
Urdu: فلکی میکانیات۔ تجاذبی میکانیات۔ اجرامِ فلکی کی حرکت و رفتار۔