PSO J172.3556+18.7734 is an astrophysical jet that was discovered in May 2011. It was originally thought to be a quasar by astronomers; as of March 8, 2021, it is now classified as a cosmic jet (astrophysical jet). As of 2021, it is the farthest jet discovered with a redshift of 6.82.
See also List of the most distant astronomical objects List of quasars QSO J0313–1806
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