LTT 3780, also known as TOI-732, is a binary system composed of two red dwarfs. Two planets orbit the primary star, a super-Earth (1.33 Earth Radii), and a Hycean planet (2.3 Earth Radii). With a mass of 2.62 Earth masses, LTT 3780 Ab probably has a composition similar to Earth, while LTT 3780 Ac with a mass of 8.6 Earth Masses gives it a composition primarily composed of water with a thick atmosphere above it. The system is within a good distance for potential atmospheric study.
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