Wiktionary
n. (context classical mechanics English) A theoretical point with mass assigned to it.
Usage examples of "point mass".
Basically the big bang theory -- which pictures the universe as exploding from a single point mass, like a titanic bomb -- was in competition with the steady state universe, which has been going on forever and will continue to do so.
Kita Point mass, a chunk of rock, a cinder radiating only the dimmest warmth into the dark, light-less, lonely, and far, far too big for The Pride to drag with her into jump.
The solidity was there, a sudden jump in every mass/drive instrument on the bridge, lights flaring red, a static washout on the number four screen: Kita Point mass, a chunk of rock, a cinder radiating only the dimmest warmth into the dark, light-less, lonely, and far, far too big for The Pride to drag with her into jump.
Not a place hani had ever found it economical to put a station, it was just an astronomical oddity, Kura Point Mass, a lump of rock that just incidentally made hani an independent species-making a route to Meetpoint and other species through hani space only, and not through mahen Ajir, to the sure annoyance of the mahendo'sat.
Not a place hani had ever found it economical to put a station, it was just an astronomical oddity, Kura Point Mass, a lump of rock that just incidentally made hani an independent species-making a route to Meetpoint and other species through hani space only, and not through mahen Ajir, to the sure annoyance of the mahendo’.
The curved-space field that provided both a semblance of gravity and shielding against acceleration collapsed into a much weaker spherical field centered on the point mass in the engine room—.