In Greek Mythology
, she was the goddess of dreams
and the daughter of King Cepheus
and Queen Cassiope
Cassiope bragged that her daughter was more beautiful than the Nereids, daughters of Poseidon. For revenge, Poseidon sent a sea monster to ravage their kingdom. To save their lands her parents decided that Andromeda had to be sacrificed to the monster so they chained her to a rock on the shore.
Meanwhile, Perseus was flying around on Pegasus and saw Andromeda chained to the rock. He fell in love with her, freed her from the rock, and then slew the sea monster.
They were married and had six sons and a daughter. Upon her death she was placed in the sky as the constellation Andromeda.