A Revised Density Estimate for the Largest Known Exoplanet, HAT-P-67 b

Low-density (ρp < 0.1 g cm−3) hot Saturns are expected to quickly (<100 Myr) lose their atmospheres owing to stellar irradiation, explaining their rarity. HAT-P-67 b seems to be an exception, with ρp < 0.09 g cm−3 and maintaining its…

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