A recent Harris Poll found that 31 percent of Americans believe in astrology. They're wrong -- although not necessarily in the way their detractors might cite.
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.
