Astronomers using NASA’s Transiting Exoplanet Survey Satellite (TESS) have discovered three small planets orbiting a bright M-dwarf star called L 98-59. One of these planets, L 98-59b, is the smallest yet discovered by the TESS mission. An artist’s conception of the L 98-59 planetary system. Image credit: NASA’s Goddard Space Flight Center. L 98-59, also known as TOI-175, TIC 307210830, is an M dwarf about one-third the mass of the Sun. It lies...