The constellation of Cepheus, "the King", is one of the oldest constellations and plays an important part in Greek Mythology. Together with Cassiopeia, "the Queen", Cepheus ruled the northern skies.To the Arab world, Cepheus is seen as a shepard, his dogs and his sheep. Although distinctively shaped, the main stars in Cepheus are not especially bright. The red haze at the top of this image is the emission nebula IC 1396, one of the largest such complexes in the night sky. Immediately to its left is mu cephei, a red supergiant that, at more than 2500 times the diameter of the sun, (in its place its surface would reach the orbit of Saturn) is one of the largest stars known.