Astrology consists of a number of belief systems which hold that there is a relationship between astronomical phenomena and events in the human world. In the West, astrology most often consists of a system of horoscope

Horoscope

In astrology, a horoscope is a chart or diagram representing the positions of the Sun, Moon, planets, the astrological aspects, and sensitive angles at the time of an event, such as the moment of a person's birth. The word horoscope is derived from Greek words meaning "a look at the hours" In...

s that claim to predict aspects of an individual's personality or life history based on the positions of the sun, moon, and planetary objects at the time of their birth. Many other cultures have attached importance to astronomical events, and the Indian, Chinese

Chinese astrology

Chinese astrology is based on the traditional astronomy and calendars. The development of Chinese astrology is tied to that of astronomy, which came to flourish during the Han Dynasty ....

, and Mayan cultures developed elaborate systems for predicting terrestrial events from celestial observations.

Astrology’s origins in Indo-European

Indo-European

Indo-European may refer to:* Indo-European languages** Aryan race, a 19th century and early 20th century term for those peoples who are the native speakers of Indo-European languages...

 cultures trace to the third millennium BCE, with roots in calendrical

Calendrical calculation

A Calendrical calculation is a calculation concerning calendar dates. Calendrical calculations can be considered an area of applied mathematics.Some examples of calendrical calculations:* The number of days between two dates....

 systems used to predict seasonal shifts and to interpret celestial cycles as signs of divine communications.