Cassiopeia ("cassia juice") was a Greek mythological queen of Ethiopia, who was the wife of Cepheus and the mother of Andromeda.
Cassiopeia, having boasted herself equal in beauty to the Nereids, drew down the vengeance of Poseidon, who sent an inundation on the land and a sea-monster, Kraken, which destroyed man and beast. The oracle of Ammon having announced that no relief would be found until the king exposed his daughter Andromeda to the monster, she was fastened to a rock on the shore.
Perseus, returning from having slain the Gorgon, found Andromeda, slew the monster, set her free, and married her in spite of Phineus, to whom she had before been promised. At the wedding a quarrel took place between the rivals, and Phineus was turned to stone by the sight of the Gorgon's head (Ovid, Metam. v. 1).
Andromeda followed her husband to Tiryns in Argos, and became the ancestress of the family of the Perseidae through Perseus' and Andromeda's son, Perses.
After her death she was placed by Athena amongst the constellations in the northern sky, near Perseus and Cassiopeia. (Some say that she was chained to her throne and condemned to circle the North Star, sometimes hanging upside down in a very undignified position, as a warning.) Sophocles and Euripides (and in more modern times Corneille) made the story the subject of tragedies, and its incidents were represented in numerous ancient works of art.
Alternative: Casseipeia
Cassiopeia is a northern constellation representing the legendary queen of Ethiopia, who was the wife of Cepheus and the mother of Andromeda. It is one of the 88 modern constellations, and was also one of the 48 listed by Ptolemy.
Five of the stars of Cassiopeia form a W shape, which is one of the most distinctive patterns in the northern sky.
Cassiopeia was the site of Tycho Brahe's supernova of 1572, and is also the location of Cassiopeia A, the strongest radio source in the sky (other than the sun). Cassiopeia A is the remnant of a supernova which apparently occurred in about 1667, although there is no record of it having been observed.
If we were to observe Earth's Sun from Alpha Centauri, it would appear to be in Cassiopeia.