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Einstein crosses
August 13 , 2023
471 days
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- This event was first predicted by Albert Einstein in 1915 as a consequence of his theory of general relativity.
- The Einstein Cross is a fascinating astronomical phenomenon.
- It was discovered in 1985 by a team of astronomers led by Dennis Walsh.
- It is also known as Q2237+0305, located in the constellation Pegasus.
- It had a redshift of z= 1.7.
- That makes it one of the most distant known quasars.
- The phenomenon was named the “Einstein Cross” due to the cross-like pattern.
- The pattern was created by the four bright images of the quasar around the lensing galaxy.
- In this case, a foreground elliptical galaxy, has distorted and split a beam of light from a background galaxy about 11 billion light-years away.
- That elliptical galaxy is located around 6 billion light-years from Earth.
- The lens responsible for the Einstein Cross’s stunning display was recently developed in 2021 by the Dark Energy Spectroscopic Instrument at Kitt Peak National Observatory in Arizona, USA.
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