Here is another report on JWST and galaxies forming early in the universe, perhaps z 11 to 20.
Astronomers suggest more galaxies were formed in the early universe than previously thought,
https://phys.org/news/2023-01-astronomers-galaxies-early-universe-previously.html
"In a new study, a team of astronomers led by Haojing Yan at the University of Missouri used data from NASA's James Webb Space Telescope (JWST) Early Release Observations and discovered 87 galaxies that could be the earliest known galaxies in the universe."..."Finding such a large number of galaxies in the early parts of the universe suggests that we might need to revise our previous understanding of galaxy formation," Yan said. "Our finding gives us the first indication that a lot of galaxies could have been formed in the universe much earlier than previously thought."..."First batch of z ≈ 11–20 candidate objects revealed by the James Webb Space Telescope Early Release Observations on SMACS 0723-73," was published in The Astrophysical Journal Letters..."
ref - First Batch of z ≈ 11–20 Candidate Objects Revealed by the James Webb Space Telescope Early Release Observations on SMACS 0723-73,
https://iopscience.iop.org/article/10.3847/2041-8213/aca80c, 28-Dec-2022.
My observation. Using cosmology calculators,
https://lambda.gsfc.nasa.gov/toolbox/calculators.html, z = 20 with defaults, shows universe age at redshift 0.181 Gyr, light-time 13.541 Gyr, comoving radial distance 35.858 Gly.
https://www.kempner.net/cosmic.php, shows similar values. Age of universe at z=20, 0.179088 Gyr or 179 million years old when some of these galaxies formed in BB model using such large redshifts. Using H0=69 km/s/Mpc and 35.858 Gly for comoving radial distance, 4D space expands a bit faster than 2.5x c velocity.
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