# Astronomers used 69 fast radio bursts as cosmic backlights to complete the clearest census yet of the universe’s missing ordinary matter, finding that roughly 76% resides as extremely diffuse ionized gas in the vast spaces between galaxies

> **Open Intelligence Dossier** · First detected: 2026-09-11 15:07 UTC · Category: Science

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*Canonical Source: https://pulse.byoviral.com/trend/2026-09-11/astronomers-used-69-fast-radio-bursts-as-cosmic-backlights-to-complete-the*