February 2013 Horoscope: Predictions for Aries
It is unclear when Indians became aware of the precession of the equinoxes, but Bhaskar II '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. 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. For the East Asian zodiac based on the Jovian orbital cycle, see Chinese zodiac.
For other uses, see zodiac disambiguation. Babylonian star catalogues and MUL. 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.
Retrieved 19 September The Signs of the Zodiac. See also Lankford, John. History of Astronomy , Routledge, Translated and annotated by G. Toomer ; with a foreword by Owen Gingerich. Harris , Lexicon Technicum The introduction of the uniform zodiac", Archive for History of Exact Sciences , 64 6: Their Lore and Meaning , Vol.
Dover Publications, , p.
February 13 Zodiac - Full Horoscope Personality
Texts and Studies, 6 , Leiden: A History of Arabic Astronomy: New York University Press. Geminos's Introduction to the Phenomena.
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Retrieved 4 July Board of Longitude, Later form with synizesis: Philosophy of science and the occult. State University of New York Press. Ptolemy's Catalogue of Stars: Carnegie Institution of Washington, Ptolemy refers to the constellation as Septentarius "the serpent holder".
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?
Retrieved 21 March The date in other time zones may vary. Tropical Zodiac and Sidereal Zodiac". Archived from the original on 18 November Retrieved 24 March Retrieved 21 May Retrieved 7 May Retrieved 6 March The British Celestial Atlas. Babylonian astronomy Egyptian astronomy. Medieval European science Indian astronomy Medieval Islamic astronomy.
History of astrology Astrology and science Astrology and astronomy Musica universalis Tetrabiblos.
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.
See also Astrology Portal. Retrieved from " https: Ancient astronomy Astrological signs Astrology Celestial coordinate system Constellations Early scientific cosmologies.
Aries Personality: March 21 - April 20
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Views Read Edit View history. In other projects Wikimedia Commons. This page was last edited on 24 December , at Aquarians born on February 13 are go-getters. Overcoming odds is what they live for, so they may invite a struggle when there's no need to!
They have incredible energy, though they may not always use it wisely.
They find it easy to get through life on charm and good looks. Glitter is only one of their sides.
February 13 Zodiac
For February 13 people, every day is a party. These good-hearted, fun-loving people don't expect a lot -- only good companionship and an occasional shoulder to lean on.
They have a hard time settling down because they enjoy the single life. Commitment isn't a part of their vocabulary until the right mate comes along. People born on February 13 may carry emotional baggage into adulthood. This is a factor that keeps them from wanting to have children of their own, though when they do they are better able to resolve issues from their past.
Many February 13 people are heavy smokers. Alcohol can also be a problem for them, especially if they use it to cover some perceived inadequacy in their personality.