https://doi.org/10.1093/mn abstract: " we predict a new non-transiting planet, Kepler-159d, in a resonant 2:1 orbit with Kepler-159c." Chris Fox, Paul Wiegert, "Kepler 159d is mostly made up of gas, with no distinct solid surface. Kepler 159d sits within the Kepler 159’s habitable zone, Extraterrestrial dream come true: not having to walk, but floating all the time. I recall an old science fiction scenario, of floating intelligent beings having evolved. well, Fox & Wiegert have discovered the possible setup, Kepler 159d. for floating life in a goldilocks zone, not in only liquid but in gas.