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Capricornus is an unlikely looking creature, with the head and forelegs of a goat and the tail of a fish. The constellation evidently originated with the Sumerians and Babylonians, who had a fondness for amphibious creatures; the ancient Sumerians called it SUHUR-MASH-HA, the goat-fish. But to the Greeks, who named it Aegoceros (goat-horned), the constellation was identified with Pan, god of the countryside, who had the horns and legs of a goat.

Pan, a playful creature of uncertain parentage, spent much of his time chasing females or sleeping it off with a siesta. He could frighten people with his loud shout, which is the origin of the word ‘panic’. One of his offspring was Crotus, identified with the constellation Sagittarius. Pan’s attempted seduction of the nymph Syrinx failed when she turned herself into a handful of reeds. As he clutched the reeds the wind blew through them, creating an enchanting sound. Pan selected reeds of different lengths and stuck them together with wax to form the famous pipes of Pan, also called the syrinx.
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Capricornus as shown in the Uranographia of Johann Bode. South of it lies the now-obsolete constellation of Globus Aerostaticus, the balloon.


Pan came to the rescue of the gods on two separate occasions. During the battle of the gods and the Titans, Pan blew a conch shell to help put the enemy to flight. According to Eratosthenes his connection with the conch shell accounts for his fishy nature in the sky, although Hyginus says somewhat absurdly that it is because he hurled shellfish at the enemy. On a later occasion, Pan shouted a warning to the gods that the monster Typhon was approaching, sent by Mother Earth (Gaia) against the gods. At Pan’s suggestion the gods disguised themselves as animals to elude the monster. Pan himself took refuge in a river, turning the lower part of his body into a fish.

Zeus grappled with Typhon, but the monster pulled out the sinews from Zeus’s hands and feet, leaving the god crippled. Hermes and Pan replaced the sinews, allowing Zeus to resume his pursuit of Typhon. Zeus cut down the monster with thunderbolts and finally buried him under Mount Etna in Sicily, which still belches fire from the monster’s breath. In gratitude for these services, Zeus placed the image of Pan in the sky as the constellation Capricornus.

The star Alpha Capricorni is variously called Algedi or Giedi, from the Arabic al-jady meaning ‘the kid’, the Arabic name for the constellation. Delta Capricorni is called Deneb Algedi, from the Arabic for ‘the kid’s tail’. The tropic of Capricorn is the latitude on Earth at which the Sun appears overhead at noon on the winter solstice, around December 22. In Greek times the Sun was in Capricornus on this date, but the effect of precession means that the Sun is now in Sagittarius at the winter solstice.



© Ian Ridpath. All rights reserved


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