TRAPPIST-1: A Comprehensive Assessment of Planetary Masses, Atmospheric Evolution, and Prospects for Characterization

To the point

Seven temperate rocky planets orbit a nearby ultracool dwarf, and by combining many observations and models they likely lack cloud-free hydrogen atmospheres and are best explained by heavier atmospheres or little to no atmosphere, with outer members possibly keeping water, all shaped by strong irradiation and formation history, while future JWST and other techniques will tighten constraints and search for signatures like CO2 or O2; notable contributors include Martin Turbet, Emeline Bolmont, Vincent Bourrier, Brice-Olivier Demory, Jérémy Leconte, James Owen, Eric Wolf, and Julien de Wit.

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A Review of Possible Planetary Atmospheres in the TRAPPIST-1 System
nih.gov

A Review of Possible Planetary Atmospheres in the TRAPPIST-1 System

TRAPPIST-1 is a fantastic nearby (∼39.14 light years) planetary system made of at least seven transiting terrestrial-size, terrestrial-mass planets all receiving a moderate amount of irradiation. To date, this is the most observationally favourable ...