Wobbly Earth Means Your Horoscope Is Wrong

If you look to your horoscope for a preview of your day, look again: You're probably following somebody else's supposed fate.

Thanks to Earth's wobble, astrological signs are, well, bunk. (Or even more bunk than you might expect.) Astrological signs are determined by the position of the sun relative to certain constellations on a person's day of birth. The problem is, the positions were determined more than 2,000 years ago. Nowadays, the stars have shifted in the night sky so much that horoscope signs are nearly a month off. [Read: Why Your Horoscope for 2011 Is All Wrong]

"Astrology tells us that the sun is in one position, whereas astronomy tells us it's in another position," said Joe Rao, SPACE.com's skywatching columnist and a lecturer at New York's Hayden Planetarium.

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Capricorn: Jan. 20-Feb. 16.

Aquarius: Feb. 16-March 11.

Pisces: March 11-April 18.

Aries: April 18-May 13.

Taurus: May 13-June 21.

Gemini: June 21-July 20.

Cancer: July 20-Aug. 10.

Leo: Aug. 10-Sept. 16.

Virgo: Sept. 16-Oct. 30.

Libra: Oct. 30-Nov. 23.

Scorpio: Nov. 23-29.

Ophiuchus: Nov. 29-Dec. 17.

Sagittarius: Dec. 17-Jan. 20.