LHS 1903 is a cool M-dwarf (about 0.54 solar masses, 3,664 K, 0.54 solar radii), 35.7 light-years from Earth. LHS 1903 b is a 3.3-Earth-mass planet, with an orbital period of 2.2 days, at 0.027 AU from its star, and an equilibrium temperature near 796 K, discovered in 2026 via transit. LHS 1903 c is a 4.5-Earth-mass planet, with an orbital period of 6.2 days, at 0.054 AU from its star, and an equilibrium temperature near 559 K, on an eccentric orbit (e ≈ 0.09), discovered in 2026 via transit.