Astrology (from Greek ἄστρον, astron, "constellation, star"; and -λογία, -logia, "the study of") is a group of systems, traditions, and beliefs in which knowledge of the apparent relative positions of celestial bodies and related details is held to be useful in understanding, interpreting, and organizing information about personality, human affairs, and other terrestrial matters. A practitioner of astrology is called an astrologer or an astrologist. Numerous traditions and applications employing astrological concepts have arisen since its earliest recorded beginnings in the 3rd millennium BC.It has played a role in the shaping of culture, early astronomy, and other disciplines throughout history.
Astrology and astronomy were often indistinguishable before the modern era, with the desire for predictive and divinatory knowledge one of the primary motivating factors for astronomical observation. Astronomy began to diverge from astrology after a period of gradual separation from the Renaissance up until the 18th century. Eventually, astronomy distinguished itself as the scientific study of astronomical objects and phenomena without regard to the astrological speculation of these phenomena.
Astrology can be defined as the study of the positions of celestial bodies in the belief that their movements either directly influence life on Earth or correspond somehow to events experienced on a human scale. Modern astrologers define astrology as a symbolic language,an art form, and a form of divination.Despite differences of definitions, a common assumption of astrology is the use of celestial placements in order to explain past and present events and predict the future. Generally, the scientific community considers astrology a pseudoscience or superstition.Despite its rejection by virtually all scientists, 31% of Americans polled expressed a belief in astrology and 39% considered it scientific according to another study.
History of astrology
Main article: History of astrology
15th century image from the Très Riches Heures du Duc de Berry showing believed relations between areas of the body and the zodiacal signs.
Origins
The origins of much of the astrological doctrine and method that would later develop in Asia, Europe, and the Middle East are found among the ancient Babylonians and their system of celestial omens that began to be compiled around the middle of the 2nd millennium BCE.This system of celestial omens later spread either directly or indirectly through the Babylonians and Assyrians to other areas such as India, Middle East, and Greece where it merged with pre-existing indigenous forms of astrology.This Babylonian astrology came to Greece initially as early as the middle of the 4th century BCE, and then around the late 2nd or early 1st century BCE after the Alexandrian conquests, this Babylonian astrology was mixed with the Egyptian tradition of decanic astrology to create horoscopic astrology. This new form of astrology, which appears to have originated in Alexandrian Egypt, quickly spread across the ancient world into Europe, the Middle East and India.
Mechanism
As astrologers have been consistently unable to present physical mechanisms for astrology, few modern astrologers believe in a direct causal relationship between heavenly bodies and earthly events. An editorial published by the Astronomical Society of the Pacific reports that they can find no evidence for a scientifically defined mechanism by which celestial objects can influence terrestrial affairs. Some researchers have posited acausal, purely correlative, relationships between astrological observations and events, such as the theory of synchronicity proposed by Carl Jung. Others have posited a basis in divination. Still others have argued that empirical correlations can stand on their own epistemologically, and do not need the support of any theory or mechanism. To some observers, these non-mechanistic concepts raise serious questions about the feasibility of validating astrology through scientific testing, and some have gone so far as to reject the applicability of the scientific method to astrology almost entirely. Some astrologers, on the other hand, believe that astrology is amenable to the scientific method, given sufficiently sophisticated analytical methods, and they cite pilot studies they claim support this view. Consequently, several astrologers have called for or advocated continuing studies of astrology based on statistical validation.
Research
The Mars effect: relative frequency of the diurnal position of Mars in the birth chart of eminent athletes.Astrology has repeatedly failed to demonstrate its effectiveness in numerous controlled studies. Effect size studies in astrology conclude that the mean accuracy of astrological predictions is no greater than what is expected by chance, and astrology's perceived performance has disappeared on critical inspection. When testing for cognitive, behavioral, physical and other variables, one study of astrological "time twins" showed that human characteristics are not molded by the influence of the Sun, Moon and planets at the time of birth. Skeptics of astrology also suggest that the perceived accuracy of astrological interpretations and descriptions of one's personality can be accounted for by the fact that people tend to exaggerate positive 'hits' and overlook whatever does not fit, especially when vague language is used. They also argue that statistical research is often wrongly seen as evidence for astrology due to uncontrolled artifacts. A large-scale study, with a sample size of about 15,000 "astro-twins", was published in 2006. It examined the relationship between date of birth and individual differences in personality and general intelligence, and found no evidence that a connection existed. It also found no relationship between the zodiacal signs and participants' personal traits.
French psychologist and statistician Michel Gauquelin claimed to have found correlations between some planetary positions and certain human traits such as vocations. Gauquelin's most widely known claim is known as the Mars effect, which is said to demonstrate a correlation between the planet Mars occupying certain positions in the sky more often at the birth of eminent sports champions than at the birth of ordinary people. A similar claim is made by Richard Tarnas in his work Cosmos and Psyche, in which he explores correspondences between planetary alignments and historically significant events and individuals.
Since its original publication in 1955, the Mars effect has been the subject of critical studies and skeptical publications which refute it, and studies in fringe journals claiming to support or expand the original claims. Gauquelin's research has not received mainstream scientific notice.
The Forer effect is seen in astrology when most people simply accept their horoscopes as custom even if, by logic, it would mean that 1/12 of the world would have the exact same day or week.