Cassiopeia Constellation Keychain

Cassiopeia is a constellation in the northern sky named after the vain queen Cassiopeia in Greek mythology. She was in the story Clash of the Titans and was the mother of Andromada. Because the constellation Cassiopeia lies in rich Milky Way star fields, it contains many deep sky objects, including open clusters and nebulae. This is the reason why it looks so stunning when photographed. Image curtesy of Nasa.