A faint glow of helium, hanging near one of the earliest known galaxies, may be the clearest sign yet that astronomers have finally caught the universe’s first stars in action. The signal comes from a tiny object nicknamed Hebe, sitting about 3 kiloparsecs from GN-z11, a galaxy seen as it existed roughly 400 million years after the Big Bang. Using the James Webb Space Telescope, researchers say they have now confirmed a strange helium emission first noticed earlier, and the case has only grown stronger. No metal lines turned up in the data. That absence matters. The earliest stars, often called Population III stars, are thought to have formed from almost pure hydrogen and helium, before the universe had been enriched with heavier elements such as carbon, oxygen, and iron. For years, they have remained a missing piece in astronomy, predicted by theory but frustratingly hard to pin down with observations. That is why this small patch of light has drawn so much attention. Continuum-subtracted map of the HeII emission at the redshift of Hebe …