Astrology has played an important role in the
shaping of culture, early astronomy, the Vedas,[12] and various
disciplines throughout history. In fact, astrology and astronomy
were often indistinguishable before the modern era, with the desire
for predictive and divinatory knowledge one of the 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 empirical study of astronomical objects
and phenomena, without regard to the terrestrial implications of
astrology.
The word "astrology" comes from the Latin term astrologia
("astronomy"),[13] which in turn derives from the Greek noun
αστρολογία: ἄστρον, astron ("constellation" or "star") and -λογία,
-logia ("the study of").
Core beliefs
The core beliefs of astrology were prevalent in parts of the
ancient world and are epitomized in the Hermetic maxim, "as above,
so below". Tycho Brahe used a similar phrase to summarize his
studies in astrology: suspiciendo despicio, "by looking up I see
downward".[14] Although the principle that events in the heavens are
mirrored by those on Earth was once generally held in most
traditions of astrology around the world, in the West there has
historically been a debate among astrologers over the nature of the
mechanism behind astrology.
Although the connection between celestial mechanics and terrestrial
dynamics was explored first by Isaac Newton with his development of
a universal theory of gravitation, claims that the gravitational
effects of the celestial bodies are what accounts for astrological
generalizations are not substantiated by scientific research.
Most astrological traditions are based on the relative positions and
movements of various real or construed celestial bodies and on the
construction of implied or calculated celestial patterns as seen at
the time and place of the event being studied. These are chiefly the
astrological planets, the stars, the lunar nodes, Arabic parts and
hypothetical planets. The frame of reference for such apparent
positions is defined by the tropical or sidereal zodiac of twelve
signs on one hand, and by the local horizon (ascendant-descendant
axis) and midheaven-imum coeli axis on the other. This latter
(local) frame is typically further divided into the twelve
astrological houses. Furthermore, the astrological aspects are used
to determine the geometric/angular relationship(s) between the
various celestial bodies and angles in the horoscope.
Predictive astrology, in the Western tradition, employs two main
methods: astrological transits and astrological progressions. In
astrological transits the ongoing movements of the planets are
interpreted for their significance as they transit through space and
the horoscope. In astrological progressions the horoscope is
progressed forward in time according to set methods. In Vedic
astrology, the focus is on planetary periods to infer the trend,
while transits are used to time significant events. Most Western
astrologers no longer try to forecast actual events, but focus
instead on general trends and developments. By comparison, Vedic
astrologers predict both trends and events. Skeptics respond that
this practice of western astrologers allows them to avoid making
verifiable predictions, and gives them the ability to attach
significance to arbitrary and unrelated events, in a way that suits
their purpose.[15]
In the past, astrologers often relied on close observation of
celestial objects and the charting of their movements. Modern
astrologers use data provided by astronomers which are transformed
to a set of astrological tables called ephemerides,[16] showing the
changing zodiacal positions of the heavenly bodies through time.
Traditions
There are many traditions of astrology, some of which share
similar features due to the transmission of astrological doctrines
between cultures. Other traditions developed in isolation and hold
different doctrines, though they too share some features due to
drawing on similar astronomical sources.
Current
traditions
The main traditions used by modern astrologers are Hindu
Astrology (Jyotiṣa), Western astrology, and Chinese astrology.
Vedic and Western astrology share a common ancestry as horoscopic
systems of astrology, in that both traditions focus on the casting
of an astrological chart or horoscope, a representation of celestial
entities, for an event based on the position of the Sun, Moon, and
planets at the moment of the event. However, Vedic astrology uses
the sidereal or fixed or constellational zodiac, linking the signs
of the zodiac to their original constellations, while Western
astrology uses the tropical or seasonal zodiac. Because of the
precession of the equinoxes whose cycle is ~25,686 years long,
during which the extensions of the polar axes describe circles, the
twelve zodiacal signs in Western astrology no longer correspond to
the same part of the sky as their original constellations, due to
centuries of change. In effect, in Western astrology the link
between sign and constellation was broken in approximately 222 AD,
whereas in Vedic astrology the constellations remain of paramount
importance. Other differences between the two traditions include the
use of 27 (or 28) nakshatras or lunar mansions, each 13⅓ degrees
wide, which have been used in India since Vedic times, and the
systems of planetary periods known as dashas.
In Chinese astrology, a quite different tradition has evolved. By
contrast to Western and Indian astrology, the twelve signs of the
zodiac do not divide the sky, but rather the celestial equator. The
Chinese evolved a system in which each sign corresponds to one of
twelve "double-hours" that govern the day, and to one of the twelve
months. Each sign of the zodiac governs a different year, and
combines with a system based on the five elements of Chinese
cosmology to give a 60 (12 × 5) year cycle. The term Chinese
astrology is used here for convenience, but it must be noted that
versions of the same tradition exist in Korea, Japan, Vietnam,
Thailand and other Asian countries. It appears that this is a
remnant of a more ancient system of Jupiterian astrology, an
astrological system primarily based on the motion of Jupiter, which
orbits the Sun every 11.89 years.
Western astrology has been the result of the knowledge of the
earlier Indian/Vedic and Egyptian schools (each developed in their
own right, and neither shows traces of the later Babylonian
influences) being diluted and simplified in passing first through
Persia/Babylon, and then through Greece, and later Europe. In modern
times, these traditions have come into closer contact with each
other, notably with Indian and Chinese astrology having spread in
more direct form to the West, while awareness of the modern notions
of Western astrology is still fairly limited in Asia, and is not
considered useful. Astrology in the Western world has diversified
among some in modern times. New movements have appeared that have
jettisoned much of more recent traditional astrology to concentrate
on different approaches, such as a greater emphasis on midpoints, or
a more psychological approach. Some recent Western developments
include modern tropical and sidereal horoscopic astrology, including
constellational and star or point-based astrology (including aspects
to the fundamental planetary dynamics, such as perihelions and
aphelions, and nodal points resulting from the inclinations of the
planets' revolutionary planes to the Earth's ecliptic plane);
heliocentric astrology, cosmobiology; psychological astrology; sun
sign astrology; the Hamburg School of Astrology; and Uranian
astrology, a subset of the Hamburg School.
Historical
traditions
Throughout its long history, astrology has come to prominence in
many regions and undergone developments and change. There are many
astrological traditions that are historically important, but which
have largely fallen out of use. Astrologers still retain an interest
in them and regard them as an important resource. Historically
significant traditions of astrology include
Arab and Persian astrology (Medieval, Near East);
Babylonian astrology (Ancient, Near East);
Egyptian astrology;
Hellenistic astrology (Classical antiquity);
Hindu astrology and
Mayan astrology.
Esoteric
traditions
Extract and symbol key from 17th century alchemy text -
Kenelm Digby.
Many mystic or esoteric traditions have links to astrology. In
some cases, such as
Kabbalah, this involves participants incorporating elements of
astrology into their own traditions. In other cases, many
astrologers have incorporated other traditions into their own
practice of astrology, and astrology has been incorporated into
those traditions. Esoteric traditions include, but are not limited
to,
alchemy,
chiromancy,
Kabbalistic astrology,
medical astrology,
numerology,
Rosicrucian or "Rose
Cross", and
Tarot divination.
Historically, alchemy in the
Western World was particularly allied and intertwined with
traditional Babylonian-Greek style astrology; in numerous ways they
were built to complement each other in the search for
occult
or hidden knowledge.[17]
Astrology has used the concept of the four
classical elements of alchemy from antiquity up until the
present day. Traditionally, each of the seven planets in the solar
system known to the ancients was associated with, held dominion
over, and "ruled" a certain metal.[18]
Horoscopic
astrology
Horoscopic astrology is a system that some claim to have
developed in the
Mediterranean region and specifically
Hellenistic Egypt around the late 2nd or early 1st century BC.[19]
However, horoscopic astrology has been practiced in India since
ancient times, and
Vedic astrology is the oldest surviving form of horoscopic
astrology in the world.[12]
The tradition deals with two-dimensional diagrams of the heavens, or
horoscopes, created for specific moments in time. The diagram is
then used to interpret the inherent meaning underlying the alignment
of celestial bodies at that moment based on a specific set of rules
and guidelines. A horoscope was calculated normally for the moment
of an individual's birth, or at the beginning of an enterprise or
event, because the alignments of the heavens at that moment were
thought to determine the nature of the subject in question. One of
the defining characteristics of this form of astrology that makes it
distinct from other traditions is the computation of the degree of
the Eastern horizon rising against the backdrop of the
ecliptic at the specific moment under examination, otherwise
known as the ascendant. Horoscopic astrology is the most influential
and widespread form of astrology in
Africa,
India,
Europe
and the
Middle East. Medieval and most modern Western traditions of
astrology have Hellenistic origins.
Horoscope
18th century
Icelandic manuscript showing astrological houses and
glyphs for planets and signs.
Central to horoscopic astrology and its branches is the
calculation of the horoscope or astrological chart. This
two-dimensional diagrammatic representation shows the celestial
bodies' apparent positions in the heavens from the vantage of a
location on Earth at a given time and place. The horoscope is also
divided into twelve different celestial
houses which govern different areas of life. Calculations
performed in casting a horoscope involve
arithmetic and simple
geometry which serve to locate the apparent position of heavenly
bodies on desired dates and times based on astronomical tables. In
ancient Hellenistic astrology the ascendant demarcated the first
celestial house of a horoscope. The word for the ascendant in Greek
was ὡροσκόπος (hōroskopos) from which horoscope
derives. In modern times, the word has come to refer to the
astrological chart as a whole.
Branches
Traditions of horoscopic astrology can be divided into four
branches that are each directed towards specific subjects or
purposes. Often these branches use a unique set of techniques, or a
different application of the core principles of the system to a
different area. Many other subsets and applications of astrology are
derived from these four fundamental branches.
Natal astrology is the study of a person's natal chart to gain
information about the individual and their life experience.
Katarchic astrology includes both
electional and event astrology. The former uses astrology to
determine the most auspicious moment to begin an enterprise or
undertaking, and the latter to understand everything about an event
from the time at which it took place.
Horary astrology is used to answer a specific question by
studying the chart of the moment the question is posed to an
astrologer.
Mundane or world astrology is the application of astrology to
world events, including weather, earthquakes, and the rise and fall
of empires or religions. This includes the
Astrological Ages, such as the
Age of Aquarius, Age of Pisces, and so on. Each age is about
2,150 years in length, and many people use these massive ages to
characterize and describe major historical ages, as well as current
developments in the world
History
Many believe that 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 BC.[20]
They believe this system of celestial omens later spread, either
directly or indirectly through the Babylonians and Assyrians, to
other areas such as the
Middle East, and
Greece, where it merged with
pre-existing indigenous forms of astrology.[21]
Thus, Babylonian astrology migrated to Greece, initially as early as
the middle of the 4th century BC, and then around the late 2nd or
early 1st century BC, 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, spread across
the ancient world into Europe, the Middle East, and India with
varying degrees of influence.
Before
the modern era
The differentiation between astronomy and astrology varied from
place to place; they were strongly linked in ancient India,[22]
ancient Babylonia and
medieval Europe, but separated to
an extent in the
Hellenistic world. The first
semantic distinction between
astrology and astronomy was
probably given by
Isidore of Seville[23]
(see
astrology and astronomy).
The pattern of astronomical knowledge gained from astrological
endeavors has been historically repeated across numerous cultures,
from
ancient India through the classical
Maya civilization to medieval
Europe. Given this historical contribution, astrology has been
called a
protoscience along with disciplines
such as
alchemy.
Astrology was not without criticism before the modern era; it was
often challenged by Hellenistic skeptics, church authorities, and
medieval
Muslim astronomers, such as
Al-Farabi (Alpharabius),
Ibn al-Haytham
(Alhazen),
Abū Rayhān al-Bīrūnī,
Avicenna and
Averroes. Their reasons for
refuting astrology were often due to both scientific (the methods
used by astrologers being
conjectural rather than
empirical) and religious (conflicts
with orthodox
Islamic scholars) reasons.[24]
Ibn Qayyim Al-Jawziyya (1292–1350),
in his Miftah Dar al-SaCadah, used empirical arguments in
astronomy in order to refute astrology and
divination.[25]
Many prominent thinkers, philosophers and scientists, such as
Galen,
Paracelsus,
Girolamo Cardan,
Nicolaus Copernicus,
Taqi al-Din,
Tycho Brahe,
Galileo Galilei,
Johannes Kepler,
Carl Jung and others, practiced or
significantly contributed to astrology.[26][27]
Contemporary
changes
Several innovations have occurred in contemporary astrological
practice.
Western
During the middle of the 20th century,
Alfred Witte and, following him,
Reinhold Ebertin pioneered the use of
midpoints (see
Midpoint (astrology)) in horoscopic
analysis. From the 1930s to the 1980s, astrologers including
Dane Rudhyar,
Liz Greene and
Stephen Arroyo pioneered the use of
astrology for psychological analysis,
with some following the lead of psychologists like
Carl Jung. In the 1930s,
Don Neroman developed and
popularized in Europe a form of
Locational Astrology under the name
of "Astrogeography". In the 1970s, American astrologer
Jim Lewis developed and popularized
a different approach under the name of
Astrocartography. Both methods
purport to identify varying life conditions through differences in
location.
Vedic
(Hindu astrology)
Indian astrology uses a different
zodiac than
Western astrology and is a branch
of
Vedic science.[28][29]
In
India, there is a long-established
widespread belief in astrology, and it is commonly used for daily
life, foremost with regard to marriages, and secondarily with regard
to career and electional and
karmic astrology.[30][31]
In the 1960s,
H.R. Seshadri Iyer, introduced a
system including the concepts of yogi and avayogi. It generated
interest with research oriented astrologers in the West. From the
early 1990s, Indian vedic astrologer and author,
V.K. Choudhry has created and
developed the
Systems' Approach for Interpreting Horoscopes,
a simplified system of Jyotish (predictive astrology)[32]
The system, also known as "SA", helps those who are trying to learn
Jyotisha. The late K.S. Krishnamurti developed the Krishnamurti
Paddhati system based on the analysis of the stars (nakshatras),
by sub-dividing the stars in the ratio of the
dasha of the concerned planets.
The system is also known as "KP" and "sub theory". In 2001, Indian
scientists and politicians debated and critiqued a proposal to use
state money to fund research into Vedic astrology.[33]
Effects
on world culture
Astrology has had a profound influence over the past few thousand
years on Western and Eastern cultures. In the Middle Ages, when the
educated of the time believed in astrology, the system of heavenly
spheres and bodies was believed to reflect on the system of
knowledge and the world itself below. Belief in astrology holds firm
today in many parts of the world: in one poll, 31% of
Americans expressed a belief in
astrology and, according to another study, 39% considered it
scientific.[34][35]
Astrology has had an influence on both language and literature.
For example,
influenza, from medieval Latin
influentia meaning influence, was so named because doctors once
believed epidemics to be caused by unfavorable planetary and stellar
influences.[36]
The word "disaster" comes from the Italian disastro, derived
from the negative prefix dis- and from Latin aster
"star", thus meaning "ill-starred".[37]
Adjectives "lunatic" (Luna/Moon),
"mercurial" (Mercury), "venereal" (Venus),
"martial" (Mars),
"jovial" (Jupiter/Jove),
and "saturnine" (Saturn)
are all old words used to describe personal qualities said to
resemble or be highly influenced by the astrological characteristics
of the planet, some of which are derived from the attributes of the
ancient Roman gods they are named after. In literature, many
writers, notably
Geoffrey Chaucer[38][39][40]
and
William Shakespeare,[41][42]
used astrological symbolism to add subtlety and nuance to the
description of their characters' motivation(s). More recently,
Michael Ward has proposed that
C.S. Lewis imbued his
Chronicles of Narnia with the
characteristics and symbols of the seven heavens. Often, an
understanding of astrological symbolism is needed to fully
appreciate such literature.
Some modern thinkers, notably Carl Jung,[43]
believe in astrology's descriptive powers regarding the mind without
necessarily subscribing to its predictive claims. In education
astrology is reflected in the
university education of
medieval Europe, which was divided
into seven distinct areas, each represented by a particular planet
and known as the seven
liberal arts.
Dante Alighieri speculated that
these arts, which grew into the sciences we know today, fitted the
same structure as the planets. In music the best known example of
astrology's influence is in the orchestral suite called "The
Planets" by the British composer
Gustav Holst, the framework of
which is based upon the astrological symbolism of the planets.
Astrology
and science
In the Islamic world astrology was rejected during the turn of the
2nd millennium AD owing to the development of the scientific method
and the work of al-Farabi, Alhacen, al-Biruni, Avicenna and Averroes,
who made a semantic distinction between astronomy and astrology[44]
and helped to render astrology obsolete for Muslims. Muslim views on
astrology have generally remained negative.
By the time of Francis Bacon and the scientific revolution, newly
emerging scientific disciplines acquired a method of systematic
empirical induction based upon experimental observations.[45] At
this point, astrology and astronomy began to diverge; astronomy
became one of the central sciences, while astrology was increasingly
viewed as an occult science or superstition by natural scientists.
For example, Christiaan Huygens wrote in his Cosmotheoros: "And as
for the Judicial Astrology, that pretends to foretel what is to
come, it is such a ridiculous, and oftentimes mischievous Folly,
that I do not think it fit to be so much as named."[46] This
separation accelerated through the 18th and 19th centuries.[47]
Contemporary scientists, such as Richard Dawkins and Stephen
Hawking, regard astrology as unscientific,[48][49] and those such as
Andrew Fraknoi of the Astronomical Society of the Pacific have
labeled it a pseudoscience.[50] In 1975, the American Humanist
Association characterized those who have faith in astrology as doing
so "in spite of the fact that there is no verified scientific basis
for their beliefs, and indeed that there is strong evidence to the
contrary".[51] Astronomer Carl Sagan was unwilling to sign the
statement, not because he felt astrology was valid, but because he
found the statement's tone authoritarian.[52][53] Sagan stated that
he would instead have been willing to sign a statement describing
and refuting the principal tenets of astrological belief, which he
believed would have been more persuasive and would have produced
less controversy than the circulated statement.[54]
Astrophysicist Neil deGrasse Tyson asserted that "astrology was
discredited 600 years ago with the birth of modern science. 'To
teach it as though you are contributing to the fundamental knowledge
of an informed electorate is astonishing in this, the 21st century'.
Education should be about knowing how to think, 'And part of knowing
how to think is knowing how the laws of nature shape the world
around us. Without that knowledge, without that capacity to think,
you can easily become a victim of people who seek to take advantage
of you'".[55][56]
Although astrology has not been considered a science for some time,
it has been the subject of considerable research by astrologers
since the beginning of the 20th century. In their study of
20th-century research into natal astrology, Geoffrey Dean, a former
astrologer who became critical of the field, and coauthors
documented this burgeoning research activity performed primarily
within the astrological community
Research
Studies have repeatedly failed to demonstrate
statistically significant relationships between astrological
predictions and
operationally defined outcomes.[7][58]
Effect size tests of astrology-based
hypotheses conclude that the
mean accuracy of astrological predictions is no greater than what is
expected by chance. For example, when testing for
cognitive,
behavioral, physical and other
variables, one study of 2000 astrological "time twins" born
within minutes of each other did not show a celestial influence on
human characteristics.[59]
It has been suggested that other statistical research is often
wrongly seen as evidence for astrology due to uncontrolled
artifacts.[60]
Experimental psychologists have suggested that several different
effects can contribute to perception of astrological accuracy. One
observed tendency is known as the
confirmation bias, whereby people who are given a set of
multiple predictions tend to remember more of the accurate
predictions ("hits") than the inaccurate ones ("misses").
Consequently, people tend to recall the set of predictions as being
more accurate than it actually was. A second psychological
phenomenon is known as the
Forer effect, which refers to a tendency for individuals to give
high accuracy ratings to descriptions of their personality that are
presented to them as tailored specifically for them, but are in fact
vague and general enough to apply to a wide range of people. When
astrological predictions turn out to
correspond with some phenomena but not with others, the
recollected
integrity of these predictions may stem in part from
confirmation bias. When predictions use vague language, their
individualized appearance may be partially attributable to the Forer
effect.
The French psychologist and statistician who devoted his life to
the attempt to demonstrate the validity of certain fundamentals of
astrology,
Michel Gauquelin, wrote that he had found correlations between
some planetary positions and certain human traits such as vocations.[61]
Gauquelin's most widely known concept is the
Mars effect, which denotes 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 idea is explored by
Richard Tarnas in his work Cosmos and Psyche, in which he
examines 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 aim to refute it,[62][63][64]
and of studies in
fringe journals used to support or expand the original ideas.[65][66]
Gauquelin's research has not received mainstream scientific notice.
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