Assertion: star's field | /r/HasProperty | gravitational
Facets:
Source sentences:
text: It is a measure of a body's resistance to changes in velocity (inertial mass) and also of the force experienced in a gravitational field (gravitational mass): according to the theory of relativity, inertial and gravitational masses are equal
text: Initially, the subject star travels along an orbit with initial velocity, v {\displaystyle \mathbf {v} } , that is perpendicular to the impact parameter, the distance of closest approach, to the field star whose gravitational field will affect the original orbit.