The James Webb Telescope has revealed that it has captured several images of two of the oldest satellite galaxies ever seen.
The images, taken by James Webb, revealed that the two galaxies were much brighter than expected, which means that astronomers are rethinking their beliefs regarding how the first stars formed.
Studies conducted by scientists reveal that the two galaxies are billions of years old, only 100 million years following the Big Bang.
The James Webb Telescope can look at some of the oldest galaxies, because it is equipped with many high-resolution cameras that can discover in infrared many of the secrets of the universe.
Previous research estimated that some of the galaxies Webb detected might have a redshift of up to 14, but the latest results are more accurate thanks to better instrument calibrations and indicate redshifts of 10.5 and 12.5, respectively.
Webb also takes advantage of a phenomenon called gravitational lensing, in which a massive object such as a galaxy or cluster of galaxies has so much mass that it warps through space and acts like a magnifying glass, allowing researchers to see more distant galaxies behind it.
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