Part of the “Planetary Habitability Laboratory (PHL).”

Below is an illustration of all known exoplanets with respect to (wrt) their host star’s stellar flux (energy output):

Earth-sized worlds located in the solid green are ideal, habitability-wise.

(Featured image also from site; shows 10 most promising exoplanetary candidates for habitability, based on similarity to Earth; (*) indicates world has yet to be confirmed.)