astrology

astrology is a range of divinatory practices that propose a relationship between celestial phenomena and events in the human world. Various systems have been developed over millennia, with roots in ancient Babylonian astronomy and Hellenistic philosophy. It has been practiced in cultures worldwide, from Vedic astrology in India to the systems of the Maya civilization. While historically intertwined with astronomy, it is now regarded as a pseudoscience by the modern scientific community.

History

The earliest developed forms emerged in Mesopotamia during the 2nd millennium BCE, with practitioners in Babylon and Assyria creating omen-based systems. This knowledge was later transmitted to the Greek world, where figures like Ptolemy authored the influential treatise Tetrabiblos, synthesizing it with Aristotelian physics and Stoicism. It flourished in the Islamic Golden Age, with scholars such as Albumasar writing at the House of Wisdom in Baghdad, before passing into Medieval Europe. During the Renaissance, it was supported by figures including Johannes Kepler and practiced at courts like that of Elizabeth I, advised by John Dee.

Principles and concepts

Core principles typically involve the mapping of celestial bodies against a framework of the Zodiac, a belt of constellations through which the Sun, Moon, and planets appear to travel. A key tool is the natal chart or horoscope, a symbolic representation of the heavens at a specific moment, often a person's birth, plotted using an ecliptic coordinate system. Significant emphasis is placed on the positions and geometric angles, called aspects, between planets like Saturn, Jupiter, and Mars. The interpretation of these configurations is believed to delineate character and destiny.

Traditions and systems

Major traditions include Western astrology, which descends from Hellenistic astrology and is prevalent in Europe and the Americas. Jyotisha, or Vedic astrology, is a key part of the Hindu tradition and uses the sidereal zodiac. Chinese astrology operates on a system of twelve-year cycles, each represented by an animal sign within the context of the Chinese calendar and concepts like Yin and Yang. Other distinct systems include Tibetan astrology, which blends influences from China and India, and the complex calendar-based system of the Maya civilization.

Cultural impact and reception

It has profoundly influenced language, art, and literature across cultures. Phrases like "mercurial" or "jovial" derive from associations with the planets Mercury and Jupiter. It is a recurring theme in works from Geoffrey Chaucer's The Canterbury Tales to the plays of William Shakespeare. In the 20th century, newspaper horoscope columns, such as those by R. H. Naylor in the Daily Express, popularized its simplified form. Organizations like the American Federation of Astrologers and the Church of Light continue to promote its study and practice.

Criticism and controversy

The primary criticism from the scientific community is a lack of explanatory mechanism and failure to demonstrate efficacy in controlled studies. Notable tests, such as those conducted by Shawn Carlson and published in Nature, have found predictions no more accurate than chance. Prominent skeptics like Carl Sagan and organizations such as the Committee for Skeptical Inquiry have argued it is a pseudoscience. The American Astronomical Society and other scientific bodies have consistently rejected its premises, citing a conflict with established understanding from physics and astronomy.