JWST observes normal AGB stars at Cosmic Noon through 5000x gravitational lensing

Summary

This article discusses a scientific study where researchers used the James Webb Space Telescope (JWST) to observe a galaxy magnified 5000 times through gravitational lensing. The study focuses on identifying "other red dots" — normal asymptotic giant branch (AGB) stars at "Cosmic Noon" (a peak epoch of star formation in the universe's history) that appear as red dots in JWST images. The research demonstrates how extreme gravitational lensing allows astronomers to study individual stars in distant galaxies, providing insights into stellar populations during the universe's most active star-forming period. The paper is available as an open-access preprint on arXiv.