Abstract: An astrological comparison device for providing an astrological analysis of the relationship between two people based on the specific birth information of each person. The invention includes an assembly pair of rotatably interconnected wheels including a large diameter base wheel and a smaller diameter top wheel. Each wheel is divided into twelve equal segments which are individually provided with identical astrological indicia representing the ten planets of Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto and the two angles of Midheaven and the Ascendant. In addition, for each wheel, indicia is provided to indicate the zodiac sign and/or house position and house rulerships of each of the ten planets as well as the zodiac sign of the Ascendant and Midheaven based on the birth information of each person. Each wheel refers to one person only. Code indicia is provided in the various segments of the base wheel.