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Which galaxy contains the most famous gravitational lens known as the Einstein Cross?
SpaceAstrophysics
Quick Answer
The Einstein Cross is seen in the galaxy Q2237+0305, where a foreground galaxy lenses a distant quasar into four images. The foreground galaxy acts like a cosmic magnifying glass.
The Full Story
The Einstein Cross is one of the most iconic gravitational lens systems in astronomy. It consists of four images of a distant quasar created by the gravity of a foreground galaxy, catalogued as Q2237+0305. The lensing galaxy lies much closer to Earth than the quasar, and its gravity bends the quasar’s light into a cross-like pattern. This system has been invaluable for studying gravitational lensing, dark matter, and the structure of distant quasars.
Key Facts
1.The system shows four quasar images
2.The lensing galaxy is catalogued as Q2237+0305
3.It is a classic example of gravitational lensing
YouTube Angle
Suggested video title for this topic:
"A single galaxy can split a quasar into a perfect cosmic cross."