Astrological signs, or the signs of the Zodiac, have changed over the last 5000 years, according to astronomers at the Minnesota Planetarium Society.

Ancient Babylonians based the Astrology signs on the position of the sun in the sky and what constellation it was ‘in’ (in front of) at a certain time of the year. A person’s zodiac sign is based on where the sun was in the sky on the day of their birth.

But Astrology signs, if they are based solely on the alignment of the earth, sun, and constellations in the sky, have changed.

Due to the gravitational pull of the moon, the earth wobbles, and that causes the relative position of our sky, sun, and stars to change.

This has caused, for example, the sun to now be ‘in’ the constellation of Aquarius at the same time of year that, in ancient times, it would have been in the constellation of Pisces.

“We’re off by about 10 degrees or so, a twelfth of the way around,” Parke Kunkle told FoxNews. Kunkle teaches astronomy at Minneapolis Community and Technical College and is a board member of the society.

If current alignment is considered, this is the list of dates we should be using, according to The Globe And Mail:

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 *Discarded by the Babylonians because they wanted 12 signs per year
Sagittarius: Dec. 17 – Jan. 20.