stardrift

two charts, one birth

Your horoscope sign may not match the constellation the Sun was in at your birth. Enter your details below to see both readings — modern tropical and ancient sidereal — mapped from the same sky.

Western astrology uses the tropical zodiac, fixed to seasons. Babylonian astrologers mapped planets to the sidereal zodiac, fixed to stars. Earth's precession has drifted those frames apart by roughly 24° over four millennia — often shifting Sun, Moon, and Rising sign readings. Learn how stardrift works →

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Exact birth time improves ascendant accuracy. We do not save this information — calculations run entirely in your browser.