Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivaled beauty.

It's also another one of the  48 constellations listed by the 2nd-century Greek astronomer Ptolemy.

Fun Fact:Cassiopeia has many names and they are Cassiopeia's Chair, Celestial M, Lazy M, and The Lady of the Chair.