PKS 2000-330 (also known as QSO B2000-330) is a
quasar
A quasar is an extremely Luminosity, luminous active galactic nucleus (AGN). It is pronounced , and sometimes known as a quasi-stellar object, abbreviated QSO. This emission from a galaxy nucleus is powered by a supermassive black hole with a m ...
[ located in the ]constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
Sagittarius (constellation), Sagittarius. When identified in 1982, it was the List of most distant astronomical object record holders, most distant and most luminous object known.
Distance measurements
The "distance" of a far away galaxy depends on the Distance measures (cosmology), distance measurement used. With a redshift of 3.77,[ light from this Active galactic nucleus, active galaxy is estimated to have taken around 11.7 Giga-, billion years to reach us.][ But since this galaxy is receding from Earth at an estimated rate of 274,681 km/s][ (the speed of light is 299,792 km/s), the present (co-moving) Redshift#Extragalactic observations, distance to this galaxy is estimated to be around 22.7 billion light-years (6947 Mparsec, pc).][
]
See also
*List of the most distant astronomical objects
References
{{Reflist
External links
* Wikisk
image
of PKS 2000-330
Quasars
Sagittarius (constellation)