Rotational modulation causes the luminosity of a star to vary as rotation carries star spots or other localized activity across the line of sight. Examples include RS CVn and BY Dra variables.[15]

Galilean moons are the moons of Jupiter that were discovered by Galileo Galilei in 1610. They consist of the moons Io, Europa, Ganymede, Callisto, and were the first objects found to orbit another...