and expanded away from the main sequence. It is almost certainly on the horizontal branch fusing helium in its core. It is sufficiently massive that it may die in a core-collapse supernova, or it may shed its outer layers and leave behind an unusual oxygen–neon white dwarf. Pulfrich effect Epsilon Pegasi is a fine example to observe the Pulfrich effect. This optical phenomenon is described on page 1372 of Burnham's Celestial Handbook. According to John Herschel: The apparent pendulum-like oscillation of a small star in the same vertical as the large one, when the telescope is swung from side to side. See also List of brightest stars List of nearest bright stars Lists of stars Historical brightest stars References Pegasi, Epsilon Pegasi, 08 K-type supergiants Pegasus (constellation) Enif Slow irregular variables 8308 206778 107315 BD+09 4891 Horizontal-branch stars