Apollo had a twin sister named Diana who owned a chariot as wonderful as his own, only it was wrought of pure silver and made to carry the earth's night light, called the moon. But Diana did not spend all of her time in the sky, for she loved to hunt and would often leave her chariot at home, take out her bow and arrow and spend whole nights upon the mountains with her nymphs. She was wondrously fair and full of grace but not as faithful as her brother, and at such times as she chooses to enjoy herself, earth-beings must do without a moon. Besides the gods and the goddesses who dwelt in ancient Greece, there were many heroes who were semi-divine. One recalls Perseus, Hercules, the twins Castor and Pollux and others. Perseus was a son of Jupiter and a very noted hero. One of his adventures was so thrilling that the early people of this little country impressed its story on six constellations! Hercules, the hero famed for his wonderful strength, patience and endurance, was a grandson of Perseus. He was also rewarded with a constellation. So was Orion, the giant, who has the most conspicuous figure of stars in all the sky. The twins, Castor and Pollux, were given twin stars and were much beloved by seamen for it was thought that if both stars were visible, fine weather was sure to follow. Not only were gods and heroes placed in the sky, but also objects and creatures connected with their adventures. "monstrous shadows of prodigious size, That deck'd with stars, lie scatter'd o'er the skies." --_Ovid's Metamorphoses._ (ADDISON'S _Trans._) Thus we find among the constellations Draco, the Dragon; Cygnus, the Swan; Ursa Major, the Great Bear; Ursa Minor, the Little Bear; [Figure 06: The Constellation of Cygnus, the Swan.] Lyra, the Harp; Pegasus, the Flying Horse; Cancer, the Crab; Delphinus, the Dolphin; Pisces, the Fishes; Sagitta, the Arrow; Argo, the Ship; Corona, the Crown; Leo, the Lion; Scorpius, the Scorpion; Hydra, the Watersnake; Aries, the Ram; Taurus, the Bull; Eridanus, the River, and others. Mapmakers later drew fanciful pictures of these objects and animals and heroes which had been transposed to the sky and united them up with the positions of the stars. This imaginative tapestry of figures is believed to be an attempt on the part of the ancient people to weave a record of their history in the dusk among the stars. That this most original method was successful is attested by the fact that although several thousand years have elapsed these ancient figures still stand and the names that they gave to the constellations are used by astronomers today. Many of the Grecian characters which are mentioned in the stories of the gods and heroes are personified in groups of three--the three Fates, daughters of Chaos, appointed to watch over the thread of human life-- "Spin, Spin, Clotho spin! Lachesis twist! Atropos sever!"