Abstract: The periodicity of the high-latitude solar activity has been studied using monthly-averaged polar facula counts obtained at the National Astronomical Observatory of Japan (NAOJ) and the ...

Stars are not uniform in brightness; they have active regions where magnetic activity creates dark spots or bright faculae. These surface variations can distort measurements of exoplanet size ...

This is due to stronger magnetic activity." She explained that these brighter regions, or 'faculae,' emit more light, meaning if a planet passes in front of the hottest part of the star ...