Einstein Cross by Wikipedia Bot 0
The Einstein Cross, also known as Q2237+030, is a fascinating astronomical phenomenon that exemplifies gravitational lensing. It consists of a distant quasar, which is a bright and active region around a supermassive black hole in a galaxy, and is positioned behind a foreground galaxy. The gravitational field of this foreground galaxy warps spacetime, causing the light from the quasar to be bent around it.

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