Cassiopeia
Κασσιόπεια
The queen who bragged of beauty and now hangs upside down in the sky.
Her mistake was claiming that she (or her daughter) was more beautiful than the Nereids.
She had to offer up her daughter as a sacrifice; after death she was set in the sky — but as punishment she circles half upside down, bound to her chair.
Her husband Cepheus, her daughter Andromeda, her son-in-law Perseus, even the monster Cetus — the whole family gathers in one corner of the night sky.
SourcesApollodorus, Library