JKCS 041
Encyclopedia
JKCS 041 is a group
Galaxy groups and clusters
Galaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation. They form the densest part of the large scale structure of the universe...

 of galaxies
Galaxy
A galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component tentatively dubbed dark matter. The word galaxy is derived from the Greek galaxias , literally "milky", a...

 with the distinction of being the farthest away group from Earth ever observed, as of 2009. It is estimated to be 10.2 billion light years away, seen at redshift
Redshift
In physics , redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum...

 1.9. The cluster is located in the constellation Cetus at a photometrically determined redshift of z=1.9 at right ascension declination (J2000.0).
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