Astrological age

An astrological age is a time period in astrologic theology which astrologers claim parallels major changes in the development of Earth's inhabitants, particularly relating to culture, society, and politics. There are twelve astrological ages corresponding to the twelve zodiacal signs in western astrology. Advocates believe that when one cycle of the twelve astrological ages is completed, another cycle of twelve ages begins. The length of one cycle of twelve ages is 25,860 years.
Some astrologers believe that during a given age, some events are directly caused or indirectly influenced by the astrological sign associated with that age, while other astrologers believe the different astrological ages do not influence events in any way.
Astrologers do not agree upon exact dates for the beginning or ending of the ages, with given dates varying by hundreds of years.
Overview.
There are three broad perspectives on the astrological ages:
Contentious aspects of the astrological ages.
Definitive details on the astrological ages are lacking, and consequently most details available about the astrological ages are disputed. The 20th century British astrologer Charles Carter stated that
In 2000 Neil Spencer in his book "True as the Stars Above" expressed a similar opinion about the astrological ages. Spencer singles out the astrological ages as being "fuzzy", "speculative", and the least-defined area of astrological lore. Derek and Julia Parker claim that it is impossible to state the exact date for the start of any astrological age and acknowledge that many astrologers believe the Age of Aquarius has arrived while many claim the world is at the end of the Age of Pisces.
Ray Grasse states in "Signs of the Times - Unlocking the Symbolic Language of World Events" that "there is considerable dispute over the exact starting and ending times for the different Great Ages." Paul Wright in "The Great Ages and Other Astrological Cycles" believes that much of the uncertainty related to the astrological ages is because many astrologers have a poor understanding of the meaning of the astrological symbolism and "even poorer historical knowledge".
Consensus approach to the astrological ages.
Though so many issues are contentious or disputed, there are two aspects of the astrological ages that have virtually unanimous consensus—firstly, the claimed link of the astrological ages to the axial precession of the Earth and commonly referred to as "precession of the equinoxes"; secondly, that, due to the nature of the precession of the equinoxes, the progression of the ages proceeds in reverse direction through the zodiacal signs.
Ages of equal or variable lengths.
Astrologers use many ways to divide the Great Year into twelve astrological ages. There are two popular methods. One method is to divide the Great Year into twelve astrological ages of approximately equal lengths of around 2160 years per age based on the vernal equinox moving through the sidereal zodiac. Another method is to significantly vary the duration of each astrological age based on the passage of the vernal equinox measured against the actual zodiacal constellations. Each of those twelve sections of the Great Year can be called either an astrological age, Precessional Age, or a Great Month.
The method based on the zodiacal constellations has a flaw in that from the reckoning of classical-era astronomer / astrologers like Claudius Ptolemy, many constellations overlap, a problem only eliminated in the past 200 years by the adoption of official constellation boundaries. For example, by 2700 CE the vernal point will have moved into Aquarius, but from a classical-era point of view, the vernal point will also point to Pisces due to the pre-boundary overlap.
Age transitions.
Many astrologers consider the entrance into a new astrological age a gradual transition called a "cusp". For example, Ray Grasse states that an astrological age does not begin at an exact day or year. Paul Wright states that a transition effect does occur at the border of the astrological ages. Consequently, the beginning of any age cannot be defined to a single year or a decade but blend its influences with the previous age for a period of time until the new age can stand in its own right.
Many astrologers believe that the world is transitioning from the Age of Pisces to the Age of Aquarius, which is claimed to explain that developments in the world today can be aligned to Pisces (i.e. continuing strong religious influences especially from Christianity) and Aquarius (traditional archetypes associated with Aquarius include electricity, computers, and democracy). A few astrologers consider the last c. 10 degrees of a given age (c. 720 years) as the time period during which the new age starts to make visible its influences, also called "orb of influence". In Nicholas Campion's "The Book of World Horoscopes" there are six pages listing researchers and their proposed dates for the start of the Age of Aquarius indicating that many researchers believe that each age commences at an exact date.
Albert Amao PhD states that the transition period between any two ages occurs over a one degree (1°) orb to either side of the point of intersection of two adjoining zodiacal constellations. As one degree is approximately 72 years, Amao has a transition period between ages of 144 years.
Other opinions on the astrological ages.
Ages exactly 2,000 years each.
Many astrologers find ages too erratic based on either the vernal point moving through the randomly sized zodiacal constellations or sidereal zodiac and, instead, round all astrological ages to exactly 2000 years each. In this approach the ages are usually neatly aligned so that the Aries age is found from 2000 BC to AD 1, Pisces age AD 1 to AD 2000, the Aquarian Age AD 2000 - AD 4000, and so on. This approach is inconsistent with the precession of the equinoxes. Based on precession of the equinoxes, there is a one-degree shift approximately every 72 years, so a 30-degree movement requires 2160 years to complete.
Ages involving the opposite sign.
An established school of thought is that an age is also influenced by the sign opposite to the one of the astrological age. Referring back to the precession of the Equinoxes, as the Sun crosses one constellation in the Northern Hemisphere's spring Equinox (21 March), it will cross the opposite sign in the spring Equinox in the Southern Hemisphere (21 September). For instance, the Age of Pisces is complemented by its opposite astrological sign of Virgo (the Virgin); so a few refer to the Piscean age as the 'Age of Pisces-Virgo'. Adopting this approach, the Age of Aquarius would become the Age of Aquarius-Leo. In his writings Ray Grasse also espouses the link between each sign of the zodiac and its opposite sign.
Mayan Long Count calendar and precession.
William Sullivan in "The Secret of the Incas" claims there is a direct connection between the history of the Inca Empire and precession of the equinoxes. John Major Jenkins in 'Maya Cosmogenesis 2012' believes that the Mayan Long Count Calendar is based on precession of the equinoxes and solstices. Jenkins believes that the Maya related the precession of the winter solstice sunrise against the Milky Way—an event which is currently developing and supposedly instrumental in mankind's spiritual renewal.
History.
Hipparchus.
The great demarcation point in the history of the astrological ages is around 127 BC when the Greek astronomer-astrologer Hipparchus from observation discovered that the great immovable sphere of fixed stars was not fixed but slowly moving eastwards due to what is now known as precession of the equinoxes. It is possible that some other astronomers before Hipparchus had also noticed the phenomenon, but it is Hipparchus who is credited with this discovery. 
This discovery by Hipparchus is not entirely unexpected as Hipparchus is considered to have been the greatest observational astronomer of his era, until Tycho Brahe in the 16th century CE. What is highly contentious in modern times is the claim by many that observation of the effects of precession of the equinoxes was known well before the time of Hipparchus and his contemporaries in Greece or even Mesopotamia.
Possible pre-Hipparchian recognition of precession.
Giorgio de Santillana (1902 – 1974) became professor of the History of Science in the School of Humanities at the Massachusetts Institute of Technology in 1954, and along with Hertha von Dechend they published a book entitled "Hamlet's Mill, An Essay on Myth and the Frame of Time" in 1969. It was an attempt to marry science and mythology that had become separated by the ancient Greeks. Santillana and von Dechend believed that the old mythological stories handed down from antiquity were not random fictitious tales but were accurate depictions of celestial cosmology clothed in tales to aid their oral transmission. The chaos, monsters, and violence in ancient myths are representative of the forces that shape each age. They believed that ancient myths are the remains of preliterate astronomy that became lost with the rise of the Greco-Roman civilization.
Santillana and von Dechend state that ancient myths have no historical basis but a cosmological one based on a primitive form of astrology. They recognized the importance of the heliacally rising constellation as markers for the astrological ages and claimed that knowledge of this phenomenon had been known for thousands of years previously. They claim that to understand ancient thinking it is necessary to understand astrology, not the modern sun-sign or horoscopic astrology, but the astrology of ancient times which was the "lingua franca" of ancient times.
They go further and state that our knowledge of the dawn of astrology and its relationship to ancient myths and star names is limited, and only extends back to about 2100 BC, which was during the Renaissance of Sumerian Culture; we are not able, they say, to examine older material on the subject. In "Hamlet's Mill" it is claimed that the ancient Greeks knew of three successive destructions that correlate to three ages, and that since the beginning of history the vernal point has moved through Taurus, Aries, and Pisces. Hesiod in "Works and Days" refers to five successive ages.
As early as 1811, modern researchers were examining evidence for knowledge of precession of the equinoxes and astrological ages before Hipparchus. Sir William Drummond published "Oedipus Judaicus - Allegory in the Old Testament" in 1811. Drummond expounds on his hypothesis that a greater part of the Hebrew Scriptures are merely allegorical writings that hide the true content. Furthermore, the Orientalists were mainly concerned with astronomy and most of their ancient myths are really disguised astronomical records. Drummond believed that the 49th chapter of Genesis contains prophecies allied to astronomy and that the twelve tribes of Israel represented the 12 zodiacal signs.
Drummond makes his case that at the time of Abraham, the Amorites first recorded the shift from the Age of Taurus to the Age of Aries as represented by the year commencing with the Ram (Aries) rather than the bull (Taurus). The Book of Joshua indicates that by the time of Moses the equinoxes had already shifted from Taurus to Aries, as Moses had ordained that the civil year should commence with the month of Nisan (Aries) rather than the month of Taurus. The feast of the Passover is probably a celebration of the Age of Aries with the Paschal Lamb representative of Aries, traditionally associated with the symbol of the ram or sheep.
Drummond also hypothesizes that most number references in ancient texts were coded to hide their real value by multiples of 1,000. For example, in the Old Testament Joshua commanded 30,000 men, and he slew 12,000 inhabitants of the city of Ai. The historian Berosus stated the Babylonians commenced astronomical observations 49,000 years (7 × 7 x 1000) before Alexander the Great. Most early references were related to 7 (Sun, Moon, and five visible planets), 12 (number of zodiacal signs and months per year), 30 (degrees per sign of the zodiac), and higher combinations of these numbers and other numbers associated with astronomical observations and astrology.
The problem of understanding the exact nature of ancient astrology is that it was only partly documented, leaving the question of the extent of their undocumented astrological knowledge. Michael Baigent in "From the Omens of Babylon: Astrology and Ancient Mesopotamia" suggests that there is evidence that there was probably an older or parallel oral tradition of astrology at the time of publication of Enuma Anu Enlil believed published over the period (1595–1157 BC). The ancient Mesopotamians believed that history repeated itself after a massive cycle of many years.
Post-Hipparchus.
Trepidation.
In the early post-Hipparchus period, two schools of thought developed about the slow shift of the fixed sphere of stars as discovered by Hipparchus. One school believed that at 1 degree shift per 100 years, the sphere of fixed stars would return to its starting point after 36,000 years. The trepidation school believed that the fixed stars first moved one way, then moved the other way - similar to a giant pendulum. It was believed that the 'swinging' stars first moved 8 degrees one direction, then reversed this 8 degrees travelling the other direction.
Theon of Alexandria in the 4th century AD includes trepidation when he wrote "Small Commentary to the Handy Tables". In the 5th century AD, the Greek Neoplatonist philosopher Proclus mentions that both theories were being discussed. The Indians around the 5th century AD preferred the trepidation theory but because they had observed the movement of the fixed stars by 25 degrees since ancient times (since around 1325 BC), they considered that trepidation swung back and forth around 27 degrees.
The significant early exponent of the 'circular 36,000' years method was Ptolemy and, due to the status placed upon Ptolemy by later scholars, the Christian and Muslim astronomers of the Middle Ages accepted the Great Year of 36,000 years rather than trepidation. However some scholars gave credence to both theories based on the addition of another sphere which is represented in the Alfonsine tables produced by the Toledo School of Translators in the 12th and 13th centuries. The Alfonsine tables computed the positions of the sun, moon, and planets relative to the fixed stars. The Italian astronomer Cecco d'Ascoli, professor of astrology at the University of Bologna in the early 14th century, continued to have faith in trepidation but believed it swung 10 degrees in either direction. Copernicus refers to trepidation in "De revolutionibus orbium coelestium" published in 1543.
Mithraism.
Hipparchus' discovery of precession of the equinoxes may have created the Mithraic Mysteries, colloquially also known as Mithraism, a 1st – 4th century neo-Platonic mystery cult of the Roman god Mithras. The near-total lack of written descriptions or scripture necessitates a reconstruction of beliefs and practices from the archaeological evidence, such as that found in Mithraic temples (in modern times called "mithraea"), which were real or artificial caves representing the cosmos. Until the 1970s most scholars followed Franz Cumont in identifying Mithras as a continuation of the Persian god Mithra. Cumont's continuity hypothesis led him to believe that the astrological component was a late and unimportant accretion.
Cumont's views are no longer followed. Today, the cult and its beliefs are recognized as a synthesis of late-classical Greco-Roman thought, with an astrological component even more astrology-centric than the already Roman beliefs generally were during the early Roman Empire. The details remain debated.
As far as axial precession is concerned, one scholar of Mithraism, David Ulansey, has interpreted Mithras as a personification of the force responsible for precession. He argues that the cult was a religious response to Hipparchus's discovery of precession, which – from the ancient geocentric perspective – amounted to the discovery that the "entire cosmos" (i.e., the outermost celestial sphere of the fixed stars) was moving in a previously unknown way. Ulansey's analysis is based on the so-called "tauroctony": The image of Mithras killing a bull that was placed at the center of every Mithraic temple. In the standard tauroctony, Mithras and the bull are accompanied by a "dog", a "snake", a "raven", a "scorpion" and two identical young men, with torches.
According to Ulansey, the tauroctony is a schematic star chart. The bull is Taurus, a constellation of the zodiac. In the astrological age that preceded the time of Hipparchus, the vernal equinox had taken place when the Sun was in the constellation of Taurus, and during that previous epoch the constellations of Canis Minor (The Dog), Hydra (The Snake), Corvus (The Raven), and Scorpius (The Scorpion) – that is, the constellations that correspond to the animals depicted in the tauroctony – all lay on the celestial equator (the location of which is shifted by the precession) and thus had privileged positions in the sky during that epoch. Mithras himself represents the constellation Perseus, which is located directly above Taurus the Bull: The same location occupied by Mithras in the tauroctony image. Mithras' killing of the Bull, by this reasoning, represented the power possessed by this new god to shift the entire cosmic structure, turning the cosmic sphere so that the location of the spring equinox left the constellation of Taurus (a transition symbolized by the killing of the Bull), and the Dog, Snake, Raven, and Scorpion likewise lost their privileged positions on the celestial equator.
The iconography also contains two torch-bearing twins (Cautes and Cautopates) framing the bull-slaying image – one holding a torch pointing up and the other a torch pointing down. These torch-bearers are sometimes depicted with one of them (torch up) holding or associated with a Bull and a tree with leaves, and the other (torch down) holding or associated with a Scorpion and a tree with fruit. Ulansey interprets these torch-bearers as representing the spring equinox (torch up, tree with leaves, Bull) and the autumn equinox (torch down, tree with fruit, Scorpion) in Taurus and Scorpius respectively, which is where the equinoxes were located during the preceding "Age of Taurus" symbolized in the tauroctony as a whole.
From this, Ulansey concludes that Mithraic iconography was an "astronomical code" whose secret was the existence of a new cosmic divinity, unknown to those outside the cult, whose fundamental attribute was his ability to shift the structure of the entire cosmos, and thereby to control the astrological forces believed at that time to determine human existence. That gave him the power to grant his devotees success during life and salvation after death (i.e., a safe journey through the planetary spheres and a subsequent immortal existence in the sphere of the stars).
Rate of precession.
Though the one degree per hundred years calculated for precession of the equinoxes as defined by Hipparchus and promulgated by Ptolemy was too slow, another rate of precession that was too fast also gained popularity in the 1st millennium AD. By the fourth century AD, Theon of Alexandria assumed a changing rate (trepidation) of one degree per 66 years. The tables of the Shah (Zij-i Shah) originate in the sixth century, but are unfortunately lost, but many later Arabic and Persian astronomers and astrologers refer to them and also use this value.
These later astronomers-astrologers or sources include: Al-Khwarizmi, Zij al Sindhind or "Star Tables Based on the Indian Calculation Method"(c. 800); "Tabulae probatae" or "az-Zig al-mumtan" (c. 830); Al-Battani, Albategnius, al-Zij (c. 880); and al-Sufi, Azophi (c. 965); Al Biruni (973-1048), "al Canon al Masud" or "The Masʿūdic Canon"; Arabic fixed star catalogue of 1 October 1112 (ed. Paul Kunitzsch); and "Libros del Saber de Astronomía" by Alfonso X of Castile(1252-1284).
Anno Domini.
There exists evidence that the modern calendar developed by Dionysius Exiguus in the 6th century AD commencing with the birth of Jesus Christ at AD 1 was influenced by precession of the equinoxes and astrological ages. Dionysius' desire to replace Diocletian years (Diocletian persecuted Christians) with a calendar based on the incarnation of Christ was to prevent people from believing the imminent end of the world. At the time it was believed that the Resurrection and end of the world would occur 500 years after the birth of Jesus. The current Anno Mundi calendar theoretically commenced with the creation of the world based on information in the Old Testament. It was believed that based on the Anno Mundi calendar Jesus was born in the year 5500 (or 5500 years after the world was created) with the year 6000 of the Anno Mundi calendar marking the end of the world.
Anno Mundi 6000 (approximately AD 500) was thus equated with the Second Coming of Christ and the end of the world. Since this date had already passed in the time of Dionysius, he therefore searched for a new end of the world at a later date. He was heavily influenced by ancient cosmology, in particular the doctrine of the Great Year that places a strong emphasis on planetary conjunctions. This doctrine says that when all the planets were in conjunction that this cosmic event would mark the end of the world. Dionysius accurately calculated that this conjunction would occur in May AD 2000. Dionysius then applied another astronomical timing mechanism based on precession of the equinoxes. Though incorrect, some oriental astronomers at the time believed that the precessional cycle was 24,000 years which included twelve astrological ages of 2,000 years each. Dionysius believed that if the planetary alignment marked the end of an age (i.e. the Pisces age), then the birth of Jesus Christ marked the beginning of the Age of Pisces 2,000 years earlier. He therefore deducted 2,000 years from the May 2000 conjunction to produce AD 1 for the incarnation of Christ.
Mashallah ibn Athari.
The renowned Persian Jewish astronomer and astrologer Masha’Allah (c.740 – 815 CE) employed precession of the equinoxes for calculating the period "Era of the Flood" dated as 3360 BCE or 259 years before the Indian Kali Yuga, believed to have commenced in 3101 BCE.
Giovanni Pico della Mirandola.
The 15th century Italian Renaissance philosopher Giovanni Pico della Mirandola published a massive attack on astrological predictions, but he did not object to all of astrology and he commented on the position of the vernal point in his day. Pico was aware of the effects of precession of the equinoxes and knew that the first point of Aries no longer existed in the constellation of Aries. Pico not only knew that the vernal point had shifted back into Pisces, he stated that in his time, the vernal point (zero degrees tropical Aries) was located at 2 degrees (sidereal) Pisces. This suggests that by whatever method of calculation he was employing, Pico expected the vernal point to shift into (sidereal) Aquarius age 144 years later as a one degree shift takes 72 years.
Isaac Newton.
Isaac Newton (1642 – 1726/27 ) determined the cause of precession and established the rate of precession at 1 degree per 72 years, very close to the best value measured today, thus demonstrating the magnitude of the error in the earlier value of 1 degree per century.
Calculation aspects.
The Earth, in addition to its diurnal (daily) rotation upon its axis and annual rotation around the Sun, incurs a precessional motion involving a slow periodic shift of the axis itself: approximately one degree every 72 years. This motion, which is caused mostly by the Moon's gravity, gives rise to the precession of the equinoxes in which the Sun's position on the ecliptic at the time of the vernal equinox, measured against the background of fixed stars, gradually changes with time.
In graphical terms, the Earth behaves like a spinning top, and tops tend to wobble as they spin. The spin of the Earth is its daily (diurnal) rotation. The spinning Earth slowly wobbles over a period slightly less than 26,000 years. From our perspective on Earth, the stars are ever so slightly 'moving' from west to east at the rate of one degree approximately every 72 years. One degree is about twice the diameter of the Sun or Moon as viewed from Earth. The easiest way to notice this slow movement of the stars is at any fixed time each year. The most common fixed time is at the vernal equinox around 21 March each year.
In astrology, an astrological age has usually been defined by the constellation or superimposed sidereal zodiac in which the Sun actually appears at the vernal equinox. This is the method that Hipparchus appears to have applied around 127 BC when he calculated precession. Since each sign of the zodiac is composed of 30 degrees, each astrological age might be thought to last about 72 (years) × 30 (degrees) = about 2160 years.
This means the Sun crosses the equator at the vernal equinox moving backwards against the fixed stars from one year to the next at the rate of one degree in seventy-two years, one constellation (on average) in about 2160 years, and the whole twelve signs in about 25,920 years, sometimes called a Platonic Year. However the length of the ages are decreasing with time as the rate of precession is increasing. Therefore, no two ages are of equal length.
First point of Aries alignment - the fiducial point.
Approximately every 26,000 years the zodiacal constellations, the associated sidereal zodiac, and the tropical zodiac used by western astrologers basically align. Technically this is when the tropical and sidereal "first point in Aries" (Aries 0°) coincided. This alignment is often called the fiducial point and, if the fiducial point could be found, fairly exact timeframes of all the astrological ages could be accurately determined if the method used to determine the astrological ages is based on the equal-sized 30 degrees per age and do not correspond to the exact constellation configuration in the sky.
However this fiducial point is difficult to determine because while there is no ambiguity about the tropical zodiac used by western astrologers, the same cannot be said of the sidereal zodiac used by Vedic astrologers. Vedic astrologers do not have unanimity on the exact location in space of their sidereal zodiac. This is because the sidereal zodiac is superimposed upon the irregular zodiacal constellation, and there are no unambiguous boundaries of the zodiacal constellations.
Modern day astronomers have defined boundaries, but this is a recent development by astronomers who are divorced from astrology, and cannot be assumed to be correct from the astrological perspective. While most astronomers and some astrologers agree that the fiducial point occurred in or around the 3rd to 5th centuries AD, there is no consensus on any exact date or tight timeframe within these three centuries. A number of dates are proposed by various astronomers and even wider timeframes by astrologers. (For an alternative approach to calibrating precession, see Alternative approach to calibrating precession in New, alternative, and fringe theories section below).
As an example of a mystic contemporary approach to precession, in Max Heindel's astrology writings, it is described, that last time the starting-point of the sidereal zodiac agreed with the tropical zodiac occurred in AD 498. A year after these points were in exact agreement, the Sun crossed the equator about fifty seconds of space into the constellation Pisces. The year following it was one minute and forty seconds into Pisces, and so it has been creeping backwards ever since, until at the present time the Sun crosses the equator in about nine degrees in the constellation Pisces. Based on this approach, it will thus be about 600 years before it actually crosses the celestial equator in the constellation Aquarius. However this is only one of many approaches and so this must remain speculation at this point of time.
Past ages.
Age of Leo (Leonian Age).
Symbol for Leo: 
When the March equinox used to occur in Leo.
Overview.
"The Golden Age". The major event in this age was deglaciation of what now constitutes much of the modern habitable world. The deglaciation ultimately caused a 300-foot (90 m) rise in the sea level. The sign Leo is a Fire sign and is mythically ruled by the Sun in astrology.
Age of Cancer (Cancerian Age).
Symbol for Cancer: 
When the March equinox used to occur in Cancer;
Overview.
"The Age of the Great Mother." Cancer is ruled by the Moon, and is associated with the process of bearing, birthing, nurturing, and protecting. In astrologic mythology this age marks the beginning of civilization, with domestication of farm animals and nomadic people settling down to living in permanent dwellings.
Religious similarities.
Widespread evidence of the mother goddess in the Near East (the 'mother' archetype in all shapes and forms is always related to the sign Cancer).
Age of Gemini (Geminian Age).
Symbol for Gemini: 
When the March equinox used to occur in Gemini;
Overview.
"The Age of Communication, Trade and the Twins"
Historical similarities.
During this mythological age writing developed, and trade started to accelerate. The constellation can be seen as two people holding hands (thought to be twins), believed by some to be symbolic for trade and communication of peoples. In myths associated with the constellation of Gemini, both writing (including literature, newspapers, journals, magazines, and works of fiction) and trade (including merchants) are traditional archetypes belonging to the sign of Gemini.
Most forms of local transportation are archetypes mythologically linked with the sign of Gemini.
Religious similarities.
Multiple gods, such as the pantheon of gods in Ancient Greek literature, are believed to have appeared in this Gemini age probably in Sumer (Mesopotamia). (Gemini is not only associated with the archetype of 'twins' and 'duality' but also 'multiplicity')
Age of Taurus (Taurean Age).
Symbol for Taurus: 
When the March equinox used to occur in Taurus;
Overview.
"The Age of Earth, Agriculture, and the Bull" This age is claimed to have occurred approximately around the time of the building of the Pyramids in Egypt.
Mythic similarities.
In the Epic of Gilgamesh, written c. 2000 BC, the hero slays the Bull of Heaven.
Religious similarities.
Bull worshiping cults began to form in Assyria, Egypt, and Crete during this mythological age.
Age of Aries (Arian Age).
Symbol for Aries: 
When the March equinox used to occur in Aries;
Overview.
"The Age of War, Fire, and the Ram"
Historical similarities.
Aries represents a Fire symbol as well as bold actions, a lot of these behaviors can be seen during any age. However, the themes emphasised during this age relate to courage, initiative, war, and adventure. Nations during this age such as the expanding empires of China, Persia, Greece, and Rome, are often cited as examples of the archetypes of Aries in action. Also the Aries constellation shows a ram running. This could correspond with the sacrifice of Abraham's Ram. The battering ram was employed by the Assyrians, Greeks, and Romans with great success during this time. (The symbol of Mars, the planetary ruler of Aries, evokes this interpretation.) According to the Roman state religion, the Roman people were the "Sons of Mars".
Aries is associated with the metal iron, and iron ore was for the first time smelted and worked into iron swords in Anatolia during the early phase of this era, replacing the heavier, softer-metalled, duller-edged bronze swords of the previous Taurus Age.
Traits of Aries such as 'initiative' may suggest the explosion of originality in the development of social aspects, sciences and arts in regions such as Ancient Greece but at the same time traits such as 'Impulsivity' may be attributed to the various Wars of the time.
Religious similarities.
The Age of Aries ushered in efforts to replace polytheism with monotheism. The earliest known attempt was by the Egyptian Pharaoh Akhenaten, who, in about 1350 BC, decreed the Sun God Aten to be the supreme deity, apparently in reaction to his earlier lack of inclusion in religious rites by his family. After his death, however, power reverted to the original polytheistic priests, who re-established the old religion. Speculation (including that of Freud) has it that later, during the reign of Ramesses II, Moses was influenced by rumour of Akhenaten's revolutionary idea, and grasped the idea of a single supreme God, who especially favoured his people, as an inspirational mechanism that best suited his people held in bondage. The symbol of Aries can be seen as representing the power of multiple gods streaming down into a single god-head.
Moses (born c. 16th–13th century BC; 7 Adar 2368 – 7 Adar 2488 in the Hebrew calendar), an early Biblical Hebrew religious leader, lawgiver, prophet, and military leader, condemns his own people upon finding them worshiping a 'golden calf' (a symbol of the previous Age of Taurus and of the worship of the bull deity) after coming down Mount Sinai. These events may have occurred during the Age of Aries (see also dating the Exodus).
See also:
Present and future ages.
Age of Pisces (Piscean Age).
Symbol for Pisces: 
While the March equinox occurs in Pisces;
Overview.
"The Age of Monotheism, Spirituality, and the Fish"
The age of Pisces began 1 AD and will end 2150 AD. With the story of the birth of Christ coinciding with this date, many Christian symbols for Christ use the astrological symbol for Pisces, the fishes. Jesus bears many of the temperaments and personality traits of a Pisces, and is thus considered an archetype of the Piscean. Moreover, the twelve apostles were called the "fishers of men," early Christians called themselves "little fishes," and a code word for Jesus was the Greek word for fish, "Ikhthus." With this, the start of the age, or the "Great Month of Pisces" is regarded as the beginning of the Christian religion. Saint Peter is recognized as the apostle of the Piscean sign.
Transition into the Aquarian Age.
Pisces has been called the "dying god," where its sign opposite in the night sky is Virgo, or, the Virgin Mary. When Jesus was asked by his disciples where the next Passover would be, he replied to them:
This coincides with the changing of the ages, into the Age of Aquarius, as the personification of the constellation of Aquarius is a man carrying pitchers of water.
Aquarius also has a double rulership: Saturn is the traditional ruler and Uranus is the modern ruler. Saturn presides over structure and form and the status quo. Because Saturn tends to be rather rigid it is often associated with the rigidity of religious doctrine.
See also:
Age of Aquarius (Aquarian Age).
Symbol for Aquarius: 
When the March equinox occurs in Aquarius;
Timeframes.
In 1928, at the Conference of the International Astronomical Union (IAU) in Leiden, the Netherlands, the edges of the 88 official constellations became defined in astronomical terms. The edge established between Pisces and Aquarius locates the beginning of the Aquarian Age around the year 2600.
The Austrian astronomer, Professor Hermann Haupt, examined the question of when the Age of Aquarius begins in an article published in 1992 by the Austrian Academy of Science: with the German title ("The Start of the Aquarian Age, an Astronomical Question?"). Based on the boundaries accepted by IAU in 1928, Haupt's article investigates the start of the Age of Aquarius by calculating the entry of the spring equinox point over the parallel cycle (d = - 4°) between the constellations Pisces and Aquarius and reaches, using the usual formula of precession (Gliese, 1982), the year 2595. However Haupt concludes:
Overview.
"The Age of Freedom, Technology (especially space travel and electricity), and the Water Bearer"
There is an expectation that the Aquarian Age will usher in a period of group consciousness. Marcia Moore and Mark Douglas claim that the lighting up of the earth artificially by electricity is a sign of the Age of Aquarius. The Age of Aquarius advances a purification of our inner spirit selves, affecting our outer physical selves, while also mirroring these purifying changes into the living planetary system and the noosphere as part of a cleaning up or cleansing of self and planet.
The water-bearer may symbolize widespread transparent, peaceful, neighborly, and sustainable living. Furthermore, they see the appearance of dictators, self-expression, and the rising influence of the entertainment industry are linked to the Aquarian Age by its opposite sign Leo.
Popular culture.
In popular culture, the expression "Age of Aquarius" usually refers to the heyday of the hippie and New Age movements of the 1960s and 1970s. The successful 1967 Broadway musical "Hair", with its opening song "Aquarius" and the memorable line "This is the dawning of the age of Aquarius", brought the Aquarian Age concept to the attention of a huge worldwide audience. The 1969 Woodstock festival was advertised as "An Aquarian Exposition in White Lake, N.Y.," while "The Aquarian" is a New Jersey alternative newspaper founded in 1969. Several members of the band Ya Ho Wha 13 adopted "Aquarian" as a surname. In Australia, the Aquarius Festival took place in 1971 and 1973.
This New Age phenomenon is seen by some astrologers to be marked by the conjunction of the planet Uranus, ruler of the sign Aquarius, and the coming age, with Pluto, ruler of the masses, bringing radical change, in the 1960s. However, as the song relates, it is only considered by astrologers as the "dawning" or "cusp" of the Age, with the full strength of the Age not occurring until some time in the future.
See also
Age of Capricorn.
Symbol for Capricorn: 
While the March equinox occurs in Capricorn;
The Age of Capricorn will follow the Age of Aquarius approximately 2150 years after the beginning of the Age of Aquarius, but the actual date for the start of the Age of Capricorn depends upon which system is used to calculate the length of an age and which system is applied to mark the start of the Age of Aquarius. There is no consensus on these matters but in broad terms, the Age of Capricorn can be expected to arrive somewhere from around the year 3500 to 4600 AD.
Sub-periods of ages.
Many research astrologers believe that the astrological ages can be divided into smaller sections along the lines of 'wheels within wheels'. The most common method is to divide each astrological ages into twelve sub-periods. There are two common ways of undertaking this process and two ways of applying these sub-periods. Furthermore, some astrologers divide the ages in different ways. For example, Lcdr David Williams employs a decanate sub-division whereby each age is divided into three equal sections. Robert Hand developed another approach entirely whereby the conjunction of the moving vernal point with specific stars within the zodiacal constellations provides an extra flavour to the corresponding historical events based on the nature of the star involved.
However Robert Hand believes that the moving Capricorn solstice point (around 20 December) near the modern New Year provides greater correlation to historical events compared to the vernal equinox. Patrizia Norelli-Bachelet used a variety of sub-periods including decans, but Patrizia advocated that the ninefold division of each sign was the most powerful and influential sub-division. The ninefold division (termed 'navamsa') of the zodiacal signs is also the most popular sign sub-division system employed by Vedic astrologers. Vedic astrologers also apply their nakshatra star asterisms in place of the twelve zodiacal constellations. There are 27 nakshatras of 13 degrees 20 minutes each, thus the average length of a 'nakshatra' age is 960 years.
Aries to Pisces sub-periods.
The most popular method of sub-dividing astrological ages is to divide each age equally into twelve sub-periods with the first sub-period Aries, followed by Taurus, Gemini, and so on, until the last sub-division, Pisces. Charles Carter was an early advocate of this approach. Technically this approach is based on the twelfth harmonic of the zodiacal signs.
Dwadasamsa sub-periods.
The alternative approach is to apply a method commonly used in Vedic astrology but with long antecedents also in western astrology. This method also divides each astrological age into twelve sub-periods but the first sub-period for each sign is the same as the sign itself, then with the following sub-periods in natural order. For example, the twelve dwadasamsa of Aquarius are Aquarius, Pisces, Aries, Taurus, and so on, until the last dwadasamsa – Capricorn. Technically this approach is based on attributes of both the twelfth and thirteenth harmonics of the zodiacal signs and can be considered to be halfway between the 12th and 13th harmonics.
Sub-period direction (forward or retrograde?).
There are two ways of applying the above sub-periods to the astrological ages.
New, alternative, and fringe myths.
Due to the lack of consensus of almost all aspects of the astrological ages, except for the astrological ages relationship to precession of the equinoxes and the retrograde order of the astrological ages, there are alternative, esoteric, innovative, fringe and newly expressed ideas about the astrological ages which have not established credibility in the wider astrological community or amongst archeoastronomers.
Alternative approach to calibrating precession.
Terry MacKinnell has developed an alternative approach to calibrating precession of the equinoxes to determine the Astrological Age. His major point of departure from the traditional modern approach is how he applies the vernal equinox to the zodiacal constellations. Instead of referring to the position of the Sun at the vernal equinox (a 'modern' mathematical technique developed by the Greeks in the late 1st millennium BC), he refers to the heliacal rising constellation on the day of the vernal equinox. This approach is based on the ancient approach to astronomical observations (the same ancient period that also saw the invention of the zodiacal constellations) prior to the development of mathematical astronomy by the ancient Greeks in the 1st millennium BC. All ancient astronomical observations were based on visual techniques.
Of all the key techniques used in ancient times, the most common in Babylon (most likely the source of astrology) and most other ancient cultures were based on phenomena that occurred close to the eastern or western horizons. MacKinnell claims that it is incongruent to use a 'modern' mathematical approach to the much older constellations that were first described well before these mathematical approaches were invented.
The heliacal rising constellation at the vernal equinox is based on the last zodiacal constellation rising above the Eastern Horizon just before dawn and before the light of the approaching Sun obliterates the stars on the eastern horizon. Currently at the vernal equinox the constellation of Aquarius has been the heliacal rising constellation for some centuries. The stars disappear about one hour before dawn depending upon magnitude, latitude, and date. This one hour represents approximately 15 degrees difference compared to the contemporary method based on the position of the Sun amongst the zodiacal constellations.
Each age is composed of 30 degrees. Therefore, 15 degrees represents about half an age or about 1080 years. Therefore, based on the heliacal rising method, the Age of Aquarius arrived about 1,080 years earlier than the modern system. John H Rogers in part one of his paper "Origins of the ancient constellations" also states that using the ancient heliacal rising method compared to the (modern) solar method produces a result that is approximately 1,000 in advance.
Using MacKinnell's approach, the Astrological Ages arrive about half an age earlier compared to the common contemporary approach to calibrating precession based on 'modern' mathematical techniques. Therefore, Terry MacKinnell has the Aquarian Age arriving in the 15th century while most astrologers have the Age of Aquarius arriving in the 27th century, almost 700 years in the future.