IOK-1 is a distant galaxy in the constellation

Coma Berenices Coma Berenices is an ancient asterism in the northern sky, which has been defined as one of the 88 modern constellations. It is in the direction of the fourth galactic quadrant, between Leo and Boötes, and it is visible in both hemisphe ...

. When discovered in 2006, it was the oldest and most distant galaxy ever found, at redshift 6.96. It was discovered in April 2006 by Masanori Iye at National Astronomical Observatory of Japan using the Subaru Telescope in

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only state ...

and is seen as it was 12.88

billion Billion is a word for a large number, and it has two distinct definitions: *1,000,000,000, i.e. one thousand million, or (ten to the ninth power), as defined on the short scale. This is its only current meaning in English. * 1,000,000,000,000, i. ...

years ago. Its emission of Lyman alpha radiation has a redshift of 6.96, corresponding to just 750 million years after the Big Bang. While some scientists have claimed other objects (such as

Abell 1835 IR1916 Abell 1835 IR1916 (also known as Abell 1835, Galaxy Abell 1835, Galaxy Abell 1835 IR1916, or simply The Abell) was a candidate for being the most distant galaxy ever observed, although that claim has not been verified by additional observations. ...

) to be even older, the IOK-1's age and composition have been more reliably established. "IOK" stands for the observers' names Iye, Ota, and Kashikawa.

References

{{DEFAULTSORT:IOK-1 Galaxies Coma Berenices

See also

References