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.
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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. 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.
Gemini Horoscope today October 8
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. Retrieved 21 May Retrieved 7 May Retrieved 6 March Rubie Zodiac category. The Zodiac. Ancient Greek astronomy. Babylonian astronomy Egyptian astronomy.
Medieval European science Indian astronomy Medieval Islamic astronomy. History of astrology Astrology and science Astrology and astronomy Musica universalis Tetrabiblos.
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Astrologers by nationality List of astrologers. Astrology and science Archaeoastronomy Astrological age Astrological aspect Astrological symbols Astrology and the classical elements Cultural influence of astrology Planets in astrology Zodiac. Authority control GND : Categories : Ancient astronomy Astrological signs Astrology Celestial coordinate system Constellations Early scientific cosmologies. Hidden categories: Webarchive template wayback links Articles containing Ancient Greek-language text Articles containing Greek-language text Wikipedia pages semi-protected against vandalism Articles containing Latin-language text All articles with unsourced statements Articles with unsourced statements from October Articles with unsourced statements from September Articles containing Sanskrit-language text Articles containing Sumerian-language text Articles containing Akkadian-language text Articles with unsourced statements from July Use dmy dates from September Wikipedia articles with GND identifiers.
It is necessary to set some new skills and to make a change for the better. This will surely attract the attention of a special person.
Horoscopes by Jamie Partridge
Love could come from any direction, so the natives must be ready. A good compatibility is predicted with the Sagittarius, Aries, and Scorpio natives and a lot of caution with the Gemini, Aquarius, and Capricorn natives.
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In October, the love life is not the most harmonious one. If you are already involved in a relationship, you are going to face many unpleasant times. Whether because you are tired of being stuck in a rut, or because you have no more patience, or because you are unsatisfied with your life partner, you will choose to spend more time as a couple.
The single ones have chances of meeting a very special person. However, in order to avoid any disappointment, it is advisable to try to get to know that person better. Journeys are very beneficial for finding a new love. The most compatible zodiac signs with the Taurus native in love relationships are: Aries, Leo, Libra, and Aquarius. The air element that governs the Gemini sign will help them adapt anywhere and anytime, will determine them to be communicative and able to easily manipulate.
They get bored quite easily, this is why they need zodiac signs that are alike, such as Libra or Aquarius, so they can dream together. A fire sign full of dynamism such as the Leo or the Aries can hold the interest of the slippery Gemini and form a perfect couple. Our astrologer will present the most important transits and astral aspects that influence the financial and professional life during Between March 6 and July , you have to discover your own methods to become more efficient at work. The majority of them become self-taught and manage to perfect their own training. It is often not at all comfortable to recognize your limits and try to overcome them.
Right from the second day of the new year, they will understand that by perfecting themselves, they increase their chances of earning more money. Saturn will help you to organize their budget otherwise, you might encounter issues starting from April 30 until September This period is certainly not suitable for gambling and the natives should not expect any inheritance — they are not going to become rich overnight. From the end of April and the beginning of September, the risks are especially high for those who are financially dependent on other people: parents, life partner, relatives or wealthier friends.
Perhaps they will not be as generous as usual and they will find themselves in some uncomfortable situations. Simultaneously, Jupiter turns them into the most appreciated employees. You will always be good communicators and you also have a natural ability to make friends anywhere, including at work.
These qualities are strengthened by Jupiter in Scorpio, which improves the relationships with colleagues and, in parallel, emphasizes their attention to details. The first steps towards financial independence are taken and the money relationships with other people are starting to gain a new shape, beneficial for both parties. In conclusion, is a busy year from a professional point of view. Although you might have doubts regarding your ability to deal with challenges, the stars are offering you opportunities to successfully overcome them.
Regarding the physical health, the entire astral chart is well illustrated.