The earliest extant Greek text using the Babylonian division of the zodiac into 12 signs of 30 equal degrees each is the Anaphoricus of Hypsicles of Alexandria fl. 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.
Libra Birthday Horoscope
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:. 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": .
December 22: Capricorn
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. Share on Facebook. Share on Twitter. Pin on Pinterest. December 17, Birthday Facts. Day of Week 2. This Year 3. Next Birthday 4. Age In Dog Years 5. Celebrities 6. Famous Birthdays 7. Critical Events 8. Birthday Meaning 9. Birthday Compatibility. A Birthday Wish Birthday Trivia Number One Song Your Past Life Number of Babies Born Popular Baby Name Florida Man Challenge Birthday Facts Summary Share This Ninja Page.
What day was my birthday Dec 17, ? What day is December 17 this year? How many days until my next birthday? How old are you in dog years?
December 17th Birthday Horoscope 2018-12222
Which celebrity shares my birthday? Who are the famous December 17 birthdays? What happened on my birthday — Dec 17 th? Indian revolutionary Rajendra Lahiri is hanged in Gonda jail, Uttar Pradesh, India, two days before the scheduled date. Otto Hahn discovers the nuclear fission of the heavy element uranium, the scientific and technological basis of nuclear energy.
Final Fantasy is released in Japan on the Famicon, marking the start of the Final Fantasy series and saving Square from bankruptcy. SpaceShipOne, piloted by Brian Binnie, makes its first powered and first supersonic flight. What does my birthday December 17, mean? What is the birthday horoscope for Dec 17, ?
What is the birthstone for December 17? What is the Birthday Compatibility for Dec 17, ? Dec 17 th Birthday Wish. What is a good birthday trivia for December 17? What was the number one song on my birthday? What were you in your past life? How many babies were born on December 17, ? What is the popular baby name on 17 Dec ? News headline for Florida Man December Roman Numerals for December 17, December 17, Birthday Facts Summary.
Find Famous Person By Name. July August September November December. Astrology Sample Megapack Subscribe and get all 16 sample reports in one mega package. People having purple as sign color are sensitive and compassionate persons that tend to initiate humanitarian projects to help others and also find their purpose in life. Rich purple shades, the colors of royalty, seem to transfer a great sense of self confidence and elegance to the high aiming Sagittarius.
The birthstone considered to be representative for Sagittarians with December 17 is the serene Turquoise. Turquoise presents a precious stone that reflects victory and glory. This zodiac birthstone should be used in all kinds of jewelry items that are to be worn frequently. It is thought to open the channels of power, communication and wealth. This was called the stone of heaven. This is one of the gemstones that is quite plentiful and available in a wide range of sizes. This gemstone comes in all kind of blue-green shades. Another gemstone considered influential for Sagittarius natives is Quartz.
It suggests openness and cleanness. Narcissus is one of those plants that denote wisdom and trustworthiness. This zodiac flower is advised to be used for gifts and decorations. It is the flower of the wise and of those who love to learn and evolve. This flower can be found during spring time.
Birthday Ideas for Libra
Tin symbolizes evolution, knowledge and innovation. This zodiac metal should be used in bracelets and other accessories. This metal is said to influence emotions and reactivity to external stimuli. Tin forms bronze in association to copper. In regard to the personality of those born on December 17, their sense of humor and open mindedness are well known but they can also show how sensible they are when in the right setting.
Their approach regarding love and family shows enthusiasm but also excitement at the thought of gradual discovery of another person in all family settings. As for the money side of life, they can get easily bored if there is not some risk and high gain component at stake. When it comes to health, they need to be careful not to put too much strain on their joints, especially hips and knees and to monitor their weight properly. What do you believe is the best thing people belonging to December 17 were being granted by mother nature?
Here's a poll about this that you are invited to answer:. This decan is strongly influenced by the Sun. This is representative for people who are ambitious and hard working just like Sagittarius and elegant but a little vain just like the Sun. This period tempers the positive and negative characteristics of the Sagittarius zodiac sign, slightly enhancing the negative ones. Being born on the 17th day of the month means an individual who is hard working, methodical, rational and dependable. The numerology for December 17 is 8. This number reveals ambition and great power but also an embrace of the spiritual side, later in life.
Those Sagittarius associated with number eight pragmatic and analytical doers in all life matters. December is the first winter month in the Northern Hemisphere, bringing the first snow of the year and the Christmas celebrations. Those born in December are humorous and sociable.
December 17 Birthday Astrology | HowStuffWorks
December 17 Zodiac people are attractive but impatient. The symbols for December include Turquoise and Zircon as gemstones and Narcissus as a plant.
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In a year in the Gregorian Calendar, December 17 is the st day or the nd day in case of leap years and until the end of the year there are left 14 days. Sagittarius is placed tenth on the list with the popularity of zodiac signs in terms of occurrence. Odd numbered sign, it is of positive meaning and considered to carry a masculine symbolism.
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