1. Leda and the swan
Leda and the Swan is a motif from Greek mythology, in which Zeus came to Leda in the form of a swan. According to later Greek mythology, Leda bore Helen and Polydeuces, children of Zeus while at the same time bearing Castor and Clytemnestra, children of her husband Tyndareus, the King of Sparta. As the story goes, Zeus took the form of a swan and raped or seduced Leda on the same night she slept with her husband, King Tyndareus. In some versions, she laid two eggs from which the children hatched.

2. Zus and Europa
The legend of Europa and Zeus begins when the ruler of the Olympian gods glimpses the young woman one day. At first sight of Europa, Zeus is instantly overcome by her beauty and grace. Not being one to ignore his desires, the god immediately comes up with a plan - he assumes the form of a glorious white bull and swims to the shore on which Europa and her female companions are playing (it should be noted that in some versions of the story, rather than disguising himself, Zeus sends a real white bull to lure the girl). The bull is so sleek and handsome, not to mention gentle, that the maidens all take turns stroking and petting the pretty creature.

3. In time, Europa feels comfortable enough with the bull to climb upon his back for a little ride. However, as soon as she is safely seated, the bull moves toward the sea, carrying the object of his affection with him. They together cross the water. Their strange but compelling journey leads them eventually to the island of Crete.

4. Upon arriving in Crete, Zeus finally casts off his disguise and reveals his divine identity to Europa. The mortal woman then becomes yet another of the god's lovers. Ultimately, Europa gives birth to a trio of sons - Minos, Rhadamanthys, and Sarpedon.

5. It was said that Zeus so loved Europa that he gave her three priceless presents. The first was Talos, a magical man made of bronze, who served as a guard on Crete. The second was Laelaps, a dog that excelled at the hunt. And the third and final gift was a javelin that always hit its target. In addition, as a last poetic touch, it is worth mentioning that the bull that "stars" in this story was transformed into the constellation Taurus.

6. Zeus and Callisto
Callisto was a nymph (or, according to some sources, the daughter of Lycaon) who was associated with the goddess of the hunt, Artemis. Young women who were devoted to the goddess hunted with her regularly, and remained virgins, like Artemis herself. Callisto had upheld these ideals faithfully, and she quickly became Artemis' favorite.

7. While Callisto spent her days and nights with Artemis' other followers, she caught the eye of Zeus. Knowing that the maiden had taken a vow of chastity, Zeus resorted to deception to get at Callisto. He came to her disguised as Artemis, and the young huntress let down her guard. Seizing the opportunity Zeus raped her.

8. Callisto became pregnant, and tried desperately to conceal her condition form the goddess. After all, she had, in a way, broken her vow to the goddess and she feared her anger. Callisto had been successful for a time, but then a day came when all of the young women who followed Artemis disrobed to bathe together in a spring. By now Callisto was beginning to show, and once she was naked her secret was revealed. Artemis was furious and she banished the young woman from her fold. Callisto wandered off to have her child alone.

9. Hera decided that this was the time to exact her revenge
Hera decided that this was the time to exact her revenge. She gripped Callisto's hair and threw her to the ground where the new mother was transformed into a bear. The hunter became the hunted. The child that Callisto had by Zeus was spirited away by Hermes to be raised by his mother, Maia. He was named Arcas, meaning "bear," and he grew up to be a fine hunter himself. Some sources have the bear captured and taken to Callisto's own father, Lycaon.

10. when Arcas was out hunting as a young man he encountered the bear
when Arcas was out hunting as a young man he encountered the bear. Callisto recognized the handsome youth as the son she could not raise herself. Forgetting her present form, she tried to come near him, but her loving mother's arms were now strong, furry paws, and her once soothing voice was now a rumbling growl. The bear scared Arcas, and he took aim at her with his spear. Zeus took pity on his former victim and intervened. He placed Callisto in the sky as the constellation Ursa Major, or "great bear," and then took Arcas and placed him in the sky near his mother as Ursa Minor, the "little bear."