The Webb telescope peered 13 billion years into the past and saw that monster stars ruled the first galaxies. Their furious winds and blinding radiation left their 'autographs' in the spectra—thus scientists uncovered the secret of how the universe became transparent.
🎯 Today's record-holder R136a1 is 265 times heavier than the Sun, but the young universe churned out such stars by the hundreds—they were commonplace.