Star gazers in the coming weeks may pick out the “royal family,” three constellations visible in the northeastern skies of late fall. These are Queen Cassiopeia (a “w” shape), King Cepheus and daughter Andromeda. In their classic story, the queen believes she is more beautiful than the sea goddesses, the Nereids. The angry gods are appeased by the sacrifice of her daughter, but hero Perseus rescues Andromeda from sea monsters, and the two are married.…