# At 23.5 times Earth’s mass, GJ 523b is massive enough that standard planet-formation models struggle to explain why it didn’t accumulate a huge hydrogen-helium envelope — yet the planet is extraordinarily dense and apparently mostly rock, and astronomer

> **Open Intelligence Dossier** · First detected: 2026-08-21 02:07 UTC · Category: Science

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*Canonical Source: https://pulse.byoviral.com/trend/2026-08-21/at-23-5-times-earth-s-mass-gj-523b-is-massive-enough-that-standard-planet*