The Technology

Mega-Earth GJ 523b Is 23 Times Earth's Mass but Only 2.5 Times Its Width

via Phys.org·Aug 17

Astronomers describe GJ 523b, a mega-Earth with 23 times the mass of our planet packed into a body only 2.5 times as wide. The density implies an unusually large rocky or metallic interior. The find tests models of how such planets form.

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