a heavy, dense body, as a galaxy, that lies along our line of sight to a more distant object, as a quasar, and whose gravitational field refracts the light of that object, splitting it into multiple images as seen from the earth.
(astronomy) a lenslike effect in which light rays are bent when passing through the gravitational field of such massive objects as galaxies or black holes
A massive celestial object, such as a galaxy, whose gravity can act as a lens that functions to bend and focus the light of a more distant object. This results in a magnified, distorted, or multiple image of the original light source for a distant observer.
noun, Physics. 1. the mass of a body as measured by its gravitational attraction for other bodies. noun 1. the mass of a body determined by its response to the force of gravity Compare inertial mass
noun, Astronomy. 1. .
- Gravitational ulcer
gravitational ulcer n. A leg ulcer that is slow to heal because of the position of the extremity and the incompetence of the valves of the varicosed veins.
noun, Physics, Astronomy. 1. (in general relativity) the shift toward longer wavelengths of electromagnetic radiation emitted by a source in a gravitational field, especially at the surface of a massive star.