The Light, the Dark, and the Dusty . ... Credit Copyright: Herbert Walter , CEDIC Team Explanation: This colorful skyscape spans about three full moons (1.5 degrees) across nebula rich starfields along the plane of our Milky Way Galaxy in the royal northern constellation Cepheus . Near the edge of the region's massive molecular cloud some 2,400 light-years away, bright reddish emission region Sharpless (Sh) 155 lies at the upper left, also known as the Cave Nebula . ... NASA Official: Jay Norris. ...