general/celestial-mechanics
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Flattening
Measure of compression between circle to ellipse or sphere to an ellipsoid of revolution
Radiation pressure
Pressure exerted upon any surface exposed to electromagnetic radiation
Tidal locking
Situation in which an astronomical object's orbital period matches its rotational period
Rotation around a fixed axis
Type of motion
Shepherd moon
Satellite associated with a planetary ring
Free-fall time
Concept in astrophysics
Binary system
Two astronomical bodies which orbit each other