The ancient Babylonians based zodiac signs on the constellation the sun was "in" on the day a person was born. During the ensuing millenniums, the moon's gravitational pull has made the Earth "wobble" around its axis, creating about a one-month bump in the stars' alignment. The result? "When (astrologers) say that the sun is in Pisces, it's really not in Pisces," said Parke Kunkle, a board member of the Minnesota Planetarium Society. Indeed, most horoscope readers who consider themselves Pisces are actually Aquarians. So instead of being sensitive, humane and idealistic, they actually are friendly, loyal and inventive. Or not.

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