Gravitational-lens meaning

A massive object whose gravitational field redirects or bends light rays.
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A massive celestial body, esp. a galaxy or cluster of galaxies, having enough gravity to refract light waves from a more distant object, esp. a quasar, so that an observer sees an amplified or multiple image (gravitational lensing)
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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.
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(astronomy) A massive body that produces distorted, magnified or multiple images of more distant objects when its gravitational field bends the path of light rays.
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