How the shape of a gravitational lens effects the lensed images
Depicts: Gravitational lenses
Copyright: ESA 2001
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Gravitational lenses produce different shaped images depending on the shape of
the lensing body. If the lens is spherical then the image appears as an
Einstein ring (in other words as a ring of light) (top); if the lens is
elongated then the image is an Einstein cross (it appears split into four
distinct images) (middle), and if the lens is a galaxy cluster then arcs
and arclets (banana-shaped images) of light are formed (bottom).
Last Update: 1 September 2019