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published in space

Einstein cross

The most emblematic example of gravitational lensing is the so-called “Einstein cross”: a quasar located eight billion light-years away in the constellation Pegasus is quadruply imaged due to the presence of a galaxy between Earth and the quasar itself. The images of the quasar form the arms of a cross around a central image. Credits: NASA-STScI.

 
 
Eni S.p.A. - P.IVA 00905811006