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A combined transmission spectrum of the Earth-sized exoplanets TRAPPIST-1 b and c

Triaud, Amaury H. M. J.; Valenti, Jeff A.; Wakeford, Hannah R. +11 more

Three Earth-sized exoplanets were recently discovered close to the habitable zone of the nearby ultracool dwarf star TRAPPIST-1 (ref. 3). The nature of these planets has yet to be determined, as their masses remain unmeasured and no observational constraint is available for the planetary population surrounding ultracool dwarfs, of which the TRAPPI…