BoRG-58

BoRG-58 is a galaxy cluster located in the constellation Boötes. It was discovered during a randomized infrared sky scan as part of the Brightest of Reionizing Galaxies (BoRG) program, using the Wide Field Camera 3 of the Hubble Space Telescope.^[1][2][3] BoRG-58 is located at a distance of 13.1 billion light-years (light-travel time).

ConstellationBoötes

Right ascension14^h 36^m 55.11^s

Declination+50° 43′ 09.8″

Number of galaxies5

Quick facts Observation data (Epoch J2000), Constellation ...

BoRG-58
Composite image of BoRG-58 from the Hubble Space Telescope and, on the right, details of five galaxies in the cluster
Observation data (Epoch J2000)
Constellation	Boötes
Right ascension	14h 36m 55.11s
Declination	+50° 43′ 09.8″
Number of galaxies	5
Redshift	~ 8
Distance	13.1 billion light-years (Light travel distance)

Close

In the cluster, more properly defined as a protocluster of galaxies, five young galaxies have been identified whose images date back to an era corresponding to when the Universe was only 600 million years old from the Big Bang. This phase coincides with the epoch of reionization,^[3] the period during which the hydrogen of the gas present in the Universe passed from an almost completely neutral state to being almost completely ionized. These five galaxies were small in size, about 1/20 of the Milky Way, but nevertheless had a luminosity comparable to it.