Gravitational lens
Videos
A gravitational lens is matter, such as a cluster of galaxies or a point particle, in sufficient quantity and density to bend light noticeably from a distant source as it travels toward an observer. T
One of Eddington's photographs of the 1919 solar eclipse experiment, presented in his 1920 paper announcing its success
Bending light around a massive object from a distant source. The orange arrows show the apparent position of the background source. The white arrows show the path of the light from the true position of the source.
In the formation known as Einstein's Cross, four images of the same distant quasar appear around a foreground galaxy due to strong gravitational lensing.
This image from the NASA/ESA Hubble Space Telescope shows the galaxy cluster MACS J1206.
Einstein Cross
Videos
The Einstein Cross is a gravitationally lensed quasar that sits directly behind the centre of the galaxy ZW 2237+030, called Huchra's Lens. Four images of the same distant quasar appear in the middle
Gravitational lens
…Gravitational lensing formalism – Concept in physics Strong gravitational lensing – Gravitational deflection of light Einstein cross – Gravitationally lensed image of a quasar Einstein ring – Feature seen when light is gravitationally lensed by an object Weak gravitational lensing…
Another lensed quasar, HE 0435−1223 in Eridanus, and its surroundings
Hubble Space Telescope captures Einstein Cross.