 Patches of the star 's surface with a lower temperature and luminosity than average are known as starspots . Small , dwarf stars such as our Sun generally have essentially featureless disks with only small starspots . Giant stars have much larger , more obvious starspots , and they also exhibit strong stellar limb darkening . That is , the brightness decreases towards the edge of the stellar disk . Red dwarf flare stars such as UV Ceti may also possess prominent starspot features . 
 Patches of the star <a href='null_genetive' title='1'><mark>'s</mark></a>surface with a lower temperature and luminosity than average are known as starspots . Small , dwarf stars such as our Sun generally have essentially featureless disks with only small starspots . Giant stars <a href='got' title='2'><mark>have</mark></a> much larger , more obvious starspots , and they also exhibit strong stellar limb darkening . That is , the brightness <a href='uninflect' title='3'><mark>decreases</mark></a> towards the edge of the stellar disk . Red dwarf flare stars such as UV Ceti may also possess prominent starspot features . 
Patches of the star  surface witt a lower temperature and luminosity than average are known as starspots . Small , dwarf stars such as our Sun generally have essentially featureless disks witt only small starspots . Giant stars got much larger , more obvious starspots , and they also exhibit strong stellar limb darkening . That is , the brightness decrease towards the edge of the stellar disk . Red dwarf flare stars such as UV Ceti may also possess prominent starspot features .