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Discover the latest findings about the TRAPPIST-1 exoplanetary system in this scientific webinar presented by LESIA researcher Elsa Ducrot. Learn about the groundbreaking observations of TRAPPIST-1 b and c using the James Webb Space Telescope's MIRI instrument, including the most recent data from November 2023. Explore the current understanding of this unique system containing seven Earth-sized rocky planets orbiting an ultracool star, with three located in the habitable zone. Understand how secondary eclipse observations in the mid-infrared spectrum help determine the presence or absence of atmospheres around the two innermost planets. Gain insights into how thermal emission measurements can reveal surface composition when no atmosphere is detected. Delve into the detailed characterization of these rocky worlds, which are currently the best-understood telluric planets after our solar system's terrestrial planets, with comprehensive data about their masses, radii, irradiation, and orbital parameters.
