Astronomers finally spotted a galaxy powered by the very first stars ever born—ones we thought were just a myth until now.
arXiv · March 17, 2026 · 2603.13471
The Takeaway
These 'Population III' stars were the first to form after the Big Bang and contain no heavy metals. This discovery identifies a pristine system of these ancient, massive stars interacting with a later galaxy, providing a direct look at the dawn of the cosmos.
From the abstract
The discovery of galaxies with extremely strong nebular continuum emission at high redshifts provide novel, unique insights into the conditions under which the first super-massive stars formed. Here we identify a galaxy at redshift $z=5.124$ observed by the JWST CAPERS survey that exhibits a prominent turnover in the rest-frame UV continuum and a pronounced Balmer `jump'. We model the entire JWST/NIRSpec Prism spectrum from rest-frame UV to optical wavelength, finding that a dominant ($>95\%$) n