UHZ1

UHZ1
Observation data (J2000 epoch)
Constellation	Sculptor
Right ascension	00h 14m 16.096s
Declination	−30° 22′ 40.285″
Redshift	10.1
Distance	13.2 Gly (4.047 Gpc) (light travel distance) 31.7 Gly (9.719 Gpc) (comoving distance)
Characteristics
Size	21,000 ly (in diameter)

UHZ1 is a background galaxy containing a quasar. At a redshift of approximately 10.1, UHZ1 is at a distance of 13.2 billion light-years, seen when our universe was about 3 percent of its current age.^[1][2] This redshift made it the most distant, and therefore earliest known quasar in the observable universe as of 2023.^[3][4] To detect this object, astronomers working at the Chandra X-ray Observatory used the Abell 2744's cluster mass as a gravitational lens in order to magnify distant objects directly behind it.^[5] At the time of discovery, it exceeded the distance record of QSO J0313−1806.^[6]

The discovery of this object has led astronomers to suggest the seeds of the first quasars may have been direct-collapse black holes, from the collapse of supermassive primordial stars at the beginning of our universe.^[2]