TRAPPIST-1e is a rocky, close-to-Earth-sized exoplanet orbiting within the habitable zone around the ultra-cool dwarf star TRAPPIST-1 approximately 40 light-years away from Earth in the constellation of Aquarius. Show Notes Available at https://exoplanetradio.com/exoplanets/trappist-1e-most-habitable-exoplanet/.