Yuga Units of Time on the Big Clock background: The Holy Science, by Shri Yukteswara Giri and Autobiography of a Yogi (Bardo Mandala) much of the information in this page is derived from the clear & detailed explanation provided in the 1932 article from East-West magazine: Astrological World Cycles, by Tara Mata (Laurie Pratt)   Term Length Unit Comments Life span for a whole universe 314,159,000,000,000 solar years = One Age of Brahma Life span for our planetary system in its present form 4,300,560,000 solar years = 1 Day of Creation  Equinoctial cycle Equinoxes take 2000 years to move through each of the 6 rashi-axes  24,000 solar years = 1 revolution of our Sun around its Twin  = 1 "Great Year" of Plato Daiba Yuga half-cycle, 'Arc' or "Electric Cycle" 12,000 solar years = 0.5 Great Year = 0.5 Equinoctial cycle Satya Yuga 4800 solar years = Krita Yuga Treta Yuga 3600 solar years   Dwapara Yuga  2400 solar years   Kali Yuga 1200 solar years = Age of Necessity Term Definition Zodiac of the Signs starts at zero degree of Thula rashi Zodiac of Constellations starts at the point of Revati, which is called zero degree of the belt of constellations Sun's ecliptic Sun's apparent path around the Earth equinox time when day and night are equal, all over the Earth Precession of the Equinoxes the movement of the Vernal-Autumnal Equinox pair, "backwards" through the 12 signs of the Zodiac. One full cycle of precession of equinoxes = 24,000 Earth years. E.g., Earth's Autumnal Equinox currently occurs at about 10 degrees of Kanya in the Zodiac of Signs. About 600 years from now, the equinoxes will ingress into Simha-Kumbha, then 2000 year after that, they will move into Karkata-Makara. Thus - regardless of the musical - the  "Age of Leo-Aquarius" begins in about 600 years... Grand Central Sun, Vishnu-navi, seat of Brahma   around this star, Earth's Sun and every other Sun (fixed star) in the universe is revolving. Names for the Central Sun include: Gk = Alcyone (Peace), brightest star of the Pleiades Hindu = Amba (mother) Babylonian = Temennu (The Foundation Stone) Arab: Kimah (Immortal Seal or Type) or Al Wasat (The Central One) Equinoctial points zero degree of Mesha zero degree of Karkata zero degree of Thula zero degree of Makara Sun's ecliptic = apparent path around the Earth = a circle so it has 360 degrees The Sun completes one circuit of 360 degrees in 365 Earth days (sunrise to sunrise) The Sun's apparent beltway around the earth is considered to be 16 degrees wide - because that is the "width of the belt" in which Earth people can see all the planets in Earth's solar system 360 degree length of the ecliptic path is divided into four quarters of 90 degrees each the four quarters start at: zero degree of Mesha zero degree of Karkata zero degree of Thula zero degree of Makara each quarter is divided into three equal sections of 30 degrees, giving the Sun's pathway around the Earth a total of 12 equal sections = 12 rashi signs One Daiba Yuga contains Length Unit Ancient Western Name ·        Satya (Krita) Yuga  4800 Solar Years Gold Age ·        Treta Yuga  3600 Solar Years Silver Age ·        Dwapara Yuga 2400 Solar Years Bronze Age ·        Kali Yuga  1200 Solar Years Iron (Earth) Age Daiba Yuga total 12,000  Solar Years
	as in the diagram below, a sequence of 2 Daiba Yugas creates a full precession of the equinoxes the first yuga sequence from Kali to Satya is called "Ascending Cycle" the second yuga sequence from Satya to Kali is called "Descending Cycle" Two Daiba yuga cycles = one Precession of Equinoxes = 24,000 solar years Below please see the widely used diagram from The Holy Science by Shri Yukteswara Giri (published version, 1949).  Copies of this diagram can be found in many places including the wonderful teaching articles from East-West magazine by SRF devotee Tara Mata (Laurie Pratt) (pub. 1932)   www.geocities.com/Athens/Academy/5185/4-11.html#as  A new Descending Cycle begins every 24,000 years when: zero degree of Thula rashi meets the "zero degree" of Constellations at the point of fixed-star Revati. The most recent "high point" or beginning of a Descending Cycle started 11,502 B.C. Descending Satya Yuga starting at 11,502 B.C. ran for 4800 years, ending in 6702 B.C. DescendingTreta  Yuga started in  6702 B.C and ran for 3600 years, ending in 3102 B.C. Descending Dvapara Yuga started 3102 B.C., ran for 2400 years, and ended in 702 B.C. Descending Kali Yuga (which runs in 2 back-to-back ages) started (descending) in 702 B.C. and ended (descending) in 498 A.D. 498 A.D.=  the rock-bottom of the 24,000 yr cycle when the Autumnal Equinox occurred at zero degrees of Thula Ascending Kali Yuga started in 498 A.D., ran for 1200 years, and ended in 1698 A.D. The Ascending Dvapara Yuga started in 1698 A.D. and will end in 4098 A.D. upon this  writing in 2008 A.D. ("anno dwapara") we are enjoying year 310 of the current dvapara yuga! The next "high point" of perfect balance occurs in 12498 A.D. (when the Autumnal Equinox = zero degree of Thula = fixed star Revati, again) The "bottom of the barrel" in terms of human quality of life, worldwide, would have occurred in the centuries immediately before and after 500 A.D. Any reader of "dark ages" history or literature will certainly concur. The Grand Central Sun resides at the center of the universe.  The Grand Central Sun is the magnetic heart of Divine Love in the universe.  Earth's Sun and all fixed stars revolve around it. The "bottom of the barrel" in human history is the point where Earth's Sun, which is busy traveling its 24,000 yr orbit around the Grand Central Sun, has reached the farthest point *away* from the Grand Central Sun. The point in dead center of the two back-to-back Kali Yugas is the absolute coldest most hopelessly love-starved nadir of Surya's awful distance from the Great Sun.  "In your patience, possess ye your souls."  ~~ Gospel of Luke 21:19 ""The Hindu scriptures declare that an earth such as ours is dissolved for one of two reasons: the inhabitants as a whole become either completely good or completely evil.  The world-mind thus generates a power which releases the captive atoms held together as an earth."  ~~ Paramahansa Yogananda, Autobiography of a Yogi
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