New research provides confirmation that the JamesWebbSpaceTelescope has identified some of the oldest galaxies yet, estimated to be 13.4 billion years old.
The James Webb Space Telescope was designed to, among other things, look back in history to search out some of the earliest galaxies ever to exist. Now, new research has provided confirmation that Webb identified some of the oldest galaxies yet, estimated to be 13.4 billion years old.
The advantage of looking at the same area of the sky imaged by Hubble is that it enables the researchers to identify galaxies that are visible in Webb’s infrared range but invisible in Hubble’s optical range. That indicates that galaxies are highly redshifted, meaning their light is shifted to the redder end of the spectrum due to the expansion of the universe. And in principle, the higher the redshift, the older the galaxy.
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