Cassiopeia
Cassiopeia is a northern circumpolar constellation. It is easiest to see in autumn. It is an M or W shaped. It is dimmer and much larger in spring. Greeks believed the stars in Cassiopeia formed a queen sitting on her throne.
Queen Cassiopeia boasted about how beautiful she and her daughter Andromeda were. She is imagined sitting on her throne, gazing at herself in a mirror as she slowly turns sideways. She eventually turns upside down. Her upside down position was said to be punishment for her bragging.
Cassiopeia is located in the northern sky. She is shaped as a Queen sitting in her chair looking at herself in a mirror.