Sky map draw by the Greeks, the space is a huge open book from where we can decrypt the myths about the world creation. Always finely worked with grey colors on a sky full of clouds, the constellation sketch, their symbols and their names expressed in ancient Greek are inspired by Eratosthenes works. The legend tells that Cassiopeia, Queen of Ethiopia, proud of her daughter beauty, Andromeda, pretended that the princess was more beautiful that the Nereids. Poseidon’s daughter wanted a revenge and sent a monster to destroy the country. At the end, the poor Andromeda is given as a sacrifice for the monster to stop the storm. The end is close until, the Greek hero Perseus, ridding Pegasus, delivered Andromeda from the monster and fall in love with her. Cassiopeia stays as a symbol of the mother love, who has her constellation beside Andromeda’s and Perseus’s constellation to be sure the family never break again.