See the narrow gap in the plotted temperature-luminosity diagram corresponding to the stellar properties of our nearest #stars? It is a narrow region where stars are not allowed, because there is a transition between stars with thin radiative outer layers and those that are fully convective. It was a surprise to be able to obtain such subtle astrophysical information by simply looking at a sample of stars with accurately characterised properties. #astronomy #astrophysics https://aasnova.org/2018/07/11/3796/