Researchers Find Universe’s First Water Brewing in Ancient Supernovae After Big Bang

The Portsmouth and UAE team’s Nature Astronomy study reveals water mass fractions in early galaxies rivaled today’s Milky Way, with pair-instability supernova cores packing up to 10⁻³ solar masses of water—making “first water in universe” a blockbuster in space science news.
Researchers discover abundant water from primordial supernovae at cosmic dawn—revealing the universe's first water brewed just after the Big Bang. Supernovae: now confirmed as cosmic hydration stations.