A facula (plural: faculae) is literally a "bright spot." It is used in planetary nomenclature for naming certain surface features of planets and moons, and is also a type of surface phenomenon on the Sun.
Solar faculae are bright spots that form in the canyons between solar granules, short-lived convection cells several thousand kilometers across that constantly form and dissipate over timescales of several minutes. Faculae are produced by concentrations of magnetic field lines, and are most commonly found in the vicinity of sunspots; this is how the Sun may be actually brighter when sunspots are more numerous.
Magnetic Fields and Directional Spectral Emissivity in Sunspots and Faculae: Complimentary Evidence of Metallic Behavior on the Surface of the Sun
Jan 01, 2013; 1 Introduction In his popular work, The Birth and Death of the Sun, George Gamow justified the gaseous nature of the Sun as...