the gravitational force of a celestial object does not change the mass of an object on that planet or celestial body
celestial_object is astronomical_object. celestial_object is not celestial_object. celestial_object is not heavenly_body. celestial_object is heavenly_body. celestial_mechanics is not astronomy. celestial_object is celestial_object. planet is not celestial_body. celestial_object is not astronomical_object.