Went back to teaching after publishing newsletters for ten years. Has anyone published a paper relating the gravity of a star to its relative luminosity. The impact would be in the "habitable" (liquid water zone) when gravitational locking of close-in planets eliminates rotation; henceforth also killing magnetic shielding. Does gravity decline faster or slower than radiative impact? Consequently would searching for Earthlike worlds be a waste of time in dwarf stars?