Hipparchus's lost work on precession never circulated very widely until it was brought to prominence by Ptolemy,  and there are few explanations of precession outside the work of Ptolemy until late Antiquity, by which time Ptolemy's influence was widely established. The Hindu zodiac uses the sidereal coordinate system , which makes reference to the fixed stars. The Hindu zodiac, being sidereal, does not maintain this seasonal alignment, but there are still similarities between the two systems.
The Hindu zodiac signs and corresponding Greek signs sound very different, being in Sanskrit and Greek respectively, but their symbols are nearly identical. This included magical uses of the zodiac, as found, e. Mughal king Jahangir issued an attractive series of coins in gold and silver depicting the twelve signs of the Zodiac. An example of the use of signs as astronomical coordinates may be found in the Nautical Almanac and Astronomical Ephemeris for the year The "Longitude of the Sun" columns show the sign represented as a digit from 0 to and including 11 , degrees from 0 to 29, minutes, and seconds.
The zodiac symbols are Early Modern simplifications of conventional pictorial representations of the signs, attested since Hellenistic times. But note that the Sanskrit and the name equivalents after c. Also, the "English translation" isn't usually used by English speakers. Latin names are standard English usage. The zodiacal signs are distinct from the constellations associated with them, not only because of their drifting apart due to the precession of equinoxes but also because the physical constellations take up varying widths of the ecliptic, so the Sun is not in each constellation for the same amount of time.
The zodiacal signs are an abstraction from the physical constellations, and each represent exactly one 12th of the full circle, or the longitude traversed by the Sun in about The path of the Sun passes through 13 constellations recognized by ancient Babylonian, Greek, and Roman astronomers including in Ptolemy 's Almagest   and the modern International Astronomical Union. Because the Babylonians had a month lunar calendar, they chose and divided up the year evenly.
The 13th was left out: Ophiuchus , the bottom part of which interjects between Scorpio and Sagittarius. Occasionally this difference between the astronomical constellations and the astrological signs is mistakenly reported in the popular press as a "change" to the list of traditional signs by some astronomical body like the IAU, NASA , or the Royal Astronomical Society.
For example, in drawing a distinction between astrology and scientific astronomy, NASA notes that "No one has shown that astrology can be used to predict the future or describe what people are like based on their birth dates. Some "parazodiacal" constellations are also touched by the paths of the planets, leading to counts of up to 25 "constellations of the zodiac". Some other constellations are also mythologically associated with the zodiacal ones: Piscis Austrinus , The Southern Fish, is attached to Aquarius. In classical maps, it swallows the stream poured out of Aquarius' pitcher, but perhaps it formerly just swam in it.
Aquila , The Eagle, was possibly associated with the zodiac by virtue of its main star, Altair. The following table compares the Gregorian dates on which the Sun enters:.
January 12 Birthday Horoscope — Zodiac Sign Personality
The theoretical beginning of Aries is the moment of vernal equinox , and all other dates shift accordingly. The precise Gregorian times and dates vary slightly from year to year as the Gregorian calendar shifts relative to the tropical year. Except for and , the vernal equinox has started on 20 March since , and is projected to until Because the Earth's axis is at an angle, some signs take longer to rise than others, and the farther away from the equator the observer is situated, the greater the difference.
Thus, signs are spoken of as "long" or "short" ascension. The zodiac system was developed in Babylonia , some 2, years ago, during the " Age of Aries ". Contemporary use of the coordinate system is presented with the choice of interpreting the system either as sidereal , with the signs fixed to the stellar background , or as tropical , with the signs fixed to the point vector of the Sun at the March equinox. Western astrology takes the tropical approach, whereas Hindu astrology takes the sidereal one.
This results in the originally unified zodiacal coordinate system drifting apart gradually, with a clockwise westward precession of 1. For the tropical zodiac used in Western astronomy and astrology, this means that the tropical sign of Aries currently lies somewhere within the constellation Pisces " Age of Pisces ". The sidereal coordinate system takes into account the ayanamsa , ayan meaning transit or movement , and amsa meaning small part , i. It is unclear when Indians became aware of the precession of the equinoxes, but Bhaskara 2 's 12th-century treatise Siddhanta Shiromani gives equations for measurement of precession of equinoxes, and says his equations are based on some lost equations of Suryasiddhanta plus the equation of Munjaala.
The discovery of precession is attributed to Hipparchus around BC. Ptolemy quotes from Hipparchus' now lost work entitled "On the Displacement of the Solstitial and Equinoctial Points" in the seventh book of his 2nd century astronomical text, Almagest , where he describes the phenomenon of precession and estimates its value.
The principle of the vernal point acting as the first degree of the zodiac for Greek astronomers is also described in the 1st century BC astronomical text of Geminus of Rhodes. Geminus explains that Greek astronomers of his era associate the first degrees of the zodiac signs with the two solstices and the two equinoxes, in contrast to the older Chaldean Babylonian system, which placed these points within the zodiac signs.
Ptolemy also demonstrates that the principle of the tropical zodiac was well known to his predecessors within his astrological text, the Tetrabiblos , where he explains why it would be an error to associate the regularly spaced signs of the seasonally aligned zodiac with the irregular boundaries of the visible constellations:. These events can be useful, for example, to estimate the cross-sectional dimensions of a minor planet , or check a star for a close companion. The Sun's placement upon the vernal equinox, which occurs annually around 21 March, defines the starting point for measurement, the first degree of which is historically known as the " first point of Aries ".
Zodiac signs have never been used to determine the boundaries of astronomical constellations that lie in the vicinity of the zodiac, which are, and always have been, irregular in their size and shape. The use of the zodiac as a means to determine astronomical measurement remained the main method for defining celestial positions by Western astronomers until the Renaissance, at which time preference moved to the equatorial coordinate system , which measures astronomical positions by right ascension and declination rather than the ecliptic-based definitions of celestial longitude and celestial latitude.
The word "zodiac" is also used in reference to the zodiacal cloud of dust grains that move among the planets, and the zodiacal light that originates from their scattering of sunlight. In Unicode, the symbols of zodiac signs are encoded in block "Miscellaneous Symbols": . From Wikipedia, the free encyclopedia. This is the latest accepted revision , reviewed on 5 October For the East Asian zodiac based on the Jovian orbital cycle, see Chinese zodiac. For other uses, see zodiac disambiguation. Further information: Former constellations. This does not happen by chance. Your horoscope profile below will inform you exactly why you are who you are.
Go ahead and get the report! Having been born on January 12, your zodiac sign is the Capricorn. Your astrological symbol is the horned Sea Goat. This symbol is much admired for the wisdom it represents. The horned Sea Goat plays a major influence in the lives of those born between 22 December and 19 January.
The planet Saturn exerts a significant influence on your life. It affects your thinking, motivations, behavior, and pretty much everything in your life.
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It is largely responsible for the high level of discipline that you exhibit in your life. Earth is your governing element. Under its rule, you have acquired such qualities as pragmatism, politeness, and organization. Its power in your life is particularly pronounced because Earth comprises the important fundamentals of air, fire, and water. Your life is under the Sagittarius-Capricorn Cusp.
This is also known as the Cusp of Prophecy. You receive a considerable amount of direction from this cusp.
As with all Cuspers in this group, your life is marked with a determination and resourcefulness that is not common. You know what you need to do with your life. In fact, you are quite good at making long-term plans in your life. You are quite patient with others. You understand that people need to be mentored. You are quick to forgive when others wrong you.
However, you are often not in harmony with your own emotions. You sometimes suffer a rollercoaster of emotions. This can be detrimental to your progress if not arrested in time. According to your astrological cusp, you can do very well in areas of responsibility. For example, you can deliver very good results as a manager or other top-level executive.go site
My Today’s Horoscope
The Cusp of Prophecy has bestowed upon you a charisma with which you can elevate the fate of humanity. This will not be hard for you, considering that you are charming in a natural way. Did you know that people find you to be romantic and dependable? Such is your nature! Interestingly, you are drawn to people with similar qualities. You have a liking for people who are energetic, trustworthy and dependable. When you meet such people, you are likely to commit for life. You can form a very stable relationship with a fellow Capricorn.
This decan is strongly influenced by the planet Jupiter. This is representative for people who are ambitious, opportunity takers just like Aries and forceful and lucky just like Jupiter. This period tempers the positive and negative characteristics of Aries zodiac sign, slightly enhancing the negative ones. Being born on the 12th day of the month shows energy, friendliness, affection but also logic and realism.
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The numerology for April 12 is 3. This can be a year in which you are bolder, more assertive, and energetic. You are especially interested in setting goals and challenges for yourself this year, and taking the necessary action to meet them. You may meet or interact with others who encourage or inspire you in some way to have more confidence in yourself. Your passions and enthusiasm run high in the period ahead, and you find it natural to channel this extra energy constructively.
This is an excellent year for enterprising endeavors and new interests, but equally as potent for relationships and creativity. It can be an especially creative, tuned-in year for self-expression, not only verbally but through hobbies, games, or sports. This is a year of relative contentment.
It's a time when love is the easiest to attract, and partnerships formed under this vibration have a better chance for longevity. You are especially able to attract others--and material things as well--this year. This is a good year for establishing harmony in the family and the home. Advice - develop existing relationships, be positive and receptive because these kinds of energies help you to attract what you desire. Instead, it's a year when reflection on the past is helpful, and when refinements to your life path should be made.
It's a good year to study, observe, research, and analyze. Unexpected twists to your life story and "chance" meetings are probable. Advice - take stock of your life in order to prepare for more exciting years to come, examine the past and plan for the future, get in touch with your deepest needs and uncover your personal power, don't strain yourself or actively try to expand.