Topic summary
Spectroscopic redshift
Extracted from the Wikipedia article Redshift.
Highest redshifts
Records for the largest observed redshift have been set and broken repeatedly as observation technology has advanced. The most reliable redshifts are from observing spectral lines. Galaxies that have held the record for largest spectroscopic redshift include GN-z11 with a redshift of z = 11.1, corresponding to 400 million years after the Big Bang; JADES-GS-z14-0 at z = 14.32 (290 million years); and MoM-z14 at z = 14.44 (280 million years).