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Astronomers Discover GJ 523b: A Massive 'Mega-Earth' That Challenges Planet Formation Models

GJ 523b: The Mega-Earth Defying Planet Formation Models

Astronomers have discovered GJ 523b, a 170-million-year-old 'Mega-Earth' with 23.5 times the mass of Earth. Its extreme density and lack of a gas envelope challenge existing models of planet formation.

Aug 20, 2026Astronomi, Ilmu Pengetahuan, News

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