Astronomy and astrophysics Gravitational lensing Concept
Strong gravitational lensing
Summary
Strong gravitational lensing is the regime of gravitational lensing in which a lens forms several images of one source, or strongly stretched arcs and rings. It happens when the source lies close to the line of sight through a dense enough mass, within about the Einstein radius. It is used to measure the masses of galaxies and clusters and, through time delays between images, the Hubble constant.
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| Tag | 20XXW00SHF |
|---|---|
| URI | m2://20XXW00SHF |
| Kind | concept |
| Writing | W0 stub |
| MSC | 85A04, 83C99 |
| Same as | |
| Changed | 3 November 2026 |
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