Early Irish astrology

Celtic Astrology is an ancient system of astrology that was used by the Druids. More recently, it has been resurrected by astrologer Helen Paterson and others.

The system includes 13 signs, instead of the twelve associated with Western Astrology and Vedic Astrology. In addition to the twelve signs in these systems, it also includes the constellation of Ophiucus, The Serpent Bearer.

Since the Celtic/Druidic cultures did not leave behind many written records, the resurrection of the system has led to many disputes in many details due to the sketchy nature of what is known about it.