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For the first time in over 2,000 years, NASA has updated the ancient Babylonian zodiac constellations to include 13 instead of 12. 3,000 years ago, the ancient Babylonians were avid sky-watchers and thought that the changing positions of constellations throughout the year could be linked to certain behaviours and events on Earth. So they invented the zodiac - a circle of 12 constellations based on the apparent path that the Sun takes across an imagined celestial sphere over the course of a year. Since the Babylonians already had a 12-month calendar (based on the phases of the Moon), each month received a slice of the zodiac pie all to itself. Now being as this happened 3,000 years ago, things were somewhat arbitrary and for whatever reason the Babylonians left a constellation out of their zodiac - Ophiuchus. To make a tidy match with their 12-month calendar, the Babylonians ignored the fact that the Sun actually moves through 13 constellations, not 12." Fast-forward to now, and NASA (and every non-NASA astronomer) notes that because of a tiny wobble in Earth’s axis, the constellations are no longer in the same position in the sky as they were 3,000 years ago. First Things First: Astrology is not Astronomy. NASA Space Place: http://spaceplace.nasa.gov/starfinder2/en/ Join PotBoys on Social Media: http://twitter.com/potboys https://www.facebook.com/Pot-Boys-190796451321008/ https://potboys.wordpress.com/