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.
Libra weekly horoscope – February 11 12222
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": . From Wikipedia, the free encyclopedia. This is the latest accepted revision , reviewed on 10 November For the East Asian zodiac based on the Jovian orbital cycle, see Chinese zodiac. For other uses, see zodiac disambiguation. Further information: Former constellations. Further information: Babylonian star catalogues and MUL. Main article: Astrological sign. Further information: Axial precession , Epoch astronomy , Sidereal and tropical astrology , Astrological age , and Ayanamsa. Astronomical symbols Chinese zodiac Circle of stars Cusp astrology Elements of the zodiac.
Oxford Dictionaries. Oxford University Press. Retrieved 19 September The Signs of the Zodiac. Wilcox, London, p. See also Lankford, John; Rothenberg, Marc History of Astronomy: An Encyclopedia. The Almagest. Translated and annotated by G. Toomer ; with a foreword by Owen Gingerich. The introduction of the uniform zodiac", Archive for History of Exact Sciences , 64 6 : —, doi : The Mesopotamian traditions. Astronomical Data Service.
Page Lennart Geminos's Introduction to the Phenomena. Princeton University Press. Ptolemy's Tetrabiblos. Astrology Classics. Project Hindsight. Retrieved 4 July Hinduism: An Alphabetical Guide. Penguin Books India. London: Board of Longitude, Patrick Grim ed. Philosophy of science and the occult. Ptolemy's Catalogue of Stars: a revision of the Almagest. Carnegie Institution of Washington, Catesby Taliaferro ed. Ptolemy refers to the constellation as Septentarius "the serpent holder".
October The Observatory. Bibcode : Obs He later issued a statement to say he had not reported that the zodiac ought to include 13 signs instead of 12, but was only mentioning that there were 13 constellations; reported in Mad Astronomy : Why did your zodiac sign change? International Planetarium Society.
Retrieved 21 March The date in other time zones may vary. The Unicode Standard. History of the Zodiac. Sophia Academic Press. Lee T. Random House, Inc. Mars here can offset some of your natural tactfulness, and without meaning to, you could come off a bit opinionated or argumentative. By all means, make your desires plain and be direct.
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Assume your partner has valid points and, later, take an unblinking look at behaviors you might actually want to shift. Once things are in a nice groove, focus on doing more together as a couple, like taking classes, exploring your neighborhood or taking short romantic day trips.
Libra Horoscope - Daily for February 11,
From now until November 25, your galactic guardian, gracious Venus, is flitting through open-minded Sagittarius and your social sector. This is a time for experimentation, whether with your dating choices, where you and your partner hang out and with whom or maybe something far more adventurous! On November 19, when Mars beams into Scorpio and your luxe second house until January 3, , you may develop an affinity for more upscale courtship—and more financially stable playmates.
With feisty Mars in your fiscal sector, couples may feel stressed about money—especially with holiday-shopping season officially underway. But this could be exactly the motivation you need to cut expenses and get your finances in order.
With the benefics widening the boundaries of your comfort zone, you just never know! While confessing your attraction could get things flowing, negative emotions are probably better kept inside or shared with a confidante.
Wait to collaborate? With the Sun in Scorpio and your third house of kindred spirits, a part of you is eager to team up. But with your ruler, Mercury—the galactic guardian of communication, technology and travel—retrograde backward from October 31 to November 20, you might want to sniff this one out before diving in headfirst. Ask all the questions and then some. On November 19, go-getter Mars will zoom into Scorpio for the rest of the year, heating up dynamic duos.
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- Horoscope Today, February 11, 12222: Know the daily astrology prediction for your zodiac sign?
Financial stress could loom until the 19th, as Mars lingers in Libra and your second house of work and money. You may have to streeeetch your budget to meet some unplanned expenses. Let that motivate you! The red planet can rev up your revenue goals.
On November 22, the Sun slips into Sagittarius and your domestic sector, a great time to tend to your home office or even explore a money-making venture with a relative. The November 26 Sagittarius new moon could bring a real estate opportunity, such as a property sale or a money-making venture through Airbnb-ing or hosting a trunk show at your home. Key Dates: November 8: Sun-Neptune trine This heart-expanding alignment could put you in highly generous spirits, so reach into your wallet—or give someone the gift of time and support.