A constellation in the northern sky. It was one of the 48 constellations listed by the 2nd century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. Cassiopeia is easily recognizable due to its distinctive 'W' shape formed by five bright stars. In the sky Cassiopeia sits with Andromeda on the South side, Perseus on the South East and Cepheus to the North. She is opposite the Big Dipper, and can be seen the clearest in early November. In Greek mythology it was considered to represent the vain queen Cassiopeia, who boasted about her unrivalled beauty.