A horoscope is an astrological chart or diagram representing the positions of the Sun, Moon, planets, astrological aspects and sensitive angles at the time of an event, such as the moment of a person's birth.
In common usage, horoscope often refers to an astrologer's interpretation, usually based on a system of solar Sun sign astrology; based strictly on the position of the Sun at the time of birth, or on the calendar significance of an event, as in Chinese astrology. In particular, many newspapers and magazines carry predictive columns, written in prose that may be written more for increasing readership than tied directly to the Sun or other aspects of the solar system, allegedly based on celestial influences in relation to the zodiacal placement of the Sun on the month of birth, cusp (2 days before or after any particular sign, an overlap), or decant (the month divided into 3 ten-day periods) of the person's month of birth, identifying the individual's Sun sign or "star sign" based on the tropical zodiac.