Ultra-Short-Period Exoplanet Defies Atmosphere Expectations, JWST Finds
TL;DR
JWST observations of TOI-561 b, a rocky world with a ~10-hour orbit close to its star, reveal a volatile-rich atmosphere and heat redistribution consistent with a magma-ocean–atmosphere cycle. This challenges the long-held view that such irradiated planets shed their atmospheres and revises the idea of the cosmic shoreline separating atmospheric from airless worlds.
Topics:sciencespace#exoplanet-atmosphere#jwst#space#toi-561-b#ultra-short-period-planet#volatile-rich-atmosphere
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