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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| 2012 phenomenon | 4/9 | https://en.wikipedia.org/wiki/2012_phenomenon | reference | science, encyclopedia | 2026-05-05T09:15:10.848554+00:00 | kb-cron |
=== Galactic alignment === There is no significant astronomical event tied to the Long Count's start date. Its supposed end date was tied to astronomical phenomena by esoteric, fringe, and New Age literature that placed great significance on astrology, especially astrological interpretations associated with the phenomenon of axial precession. Chief among these ideas is the astrological concept of a "galactic alignment".
==== Precession ==== In the Solar System, the planets and the Sun lie roughly within the same flat plane, known as the plane of the ecliptic. From our perspective on Earth, the ecliptic is the path taken by the Sun across the sky over the course of the year. The twelve constellations that line the ecliptic are known as the zodiacal constellations, and, annually, the Sun passes through all of them in turn. Additionally, over time, the Sun's annual cycle appears to recede very slowly backward by one degree every 72 years, or by one constellation approximately every 2,160 years. This backward movement, called "precession", is due to a slight wobble in the Earth's axis as it spins, and can be compared to the way a spinning top wobbles as it slows down. Over the course of 25,800 years, a period often called a Great Year, the Sun's path completes a full, 360-degree backward rotation through the zodiac. In Western astrological traditions, precession is measured from the March equinox, one of the two annual points at which the Sun is exactly halfway between its lowest and highest points in the sky. At the end of the 20th century and beginning of the 21st, the Sun's March equinox position was in the constellation Pisces moving back into Aquarius. This signaled the end of one astrological age (the Age of Pisces) and the beginning of another (the Age of Aquarius). Similarly, the Sun's December solstice position (in the northern hemisphere, the lowest point on its annual path; in the southern hemisphere, the highest) was in the constellation of Sagittarius, one of two constellations in which the zodiac intersects with the Milky Way. Every year, on the December solstice, the Sun and the Milky Way, appear (from the surface of the Earth) to come into alignment, and every year precession caused a slight shift in the Sun's position in the Milky Way. Given that the Milky Way is between 10° and 20° wide, it takes between 700 and 1,400 years for the Sun's December solstice position to precess through it. In 2012 it was about halfway through the Milky Way, crossing the galactic equator. In 2012, the Sun's December solstice fell on 21 December.
==== Mysticism ====
Mystical speculations about the precession of the equinoxes and the Sun's proximity to the center of the Milky Way appeared in Hamlet's Mill (1969) by Giorgio de Santillana and Hertha von Deschend. These were quoted and expanded upon by Terence and Dennis McKenna in The Invisible Landscape (1975). Adherents to the idea, following a theory first proposed by Munro Edmonson, alleged that the Maya based their calendar on observations of the Great Rift or Dark Rift, a band of dark dust clouds in the Milky Way, which, according to some scholars, the Maya called the Xibalba be or "Black Road". John Major Jenkins claims that the Maya were aware of where the ecliptic intersected the Black Road and gave this position in the sky a special significance in their cosmology. Jenkins said that precession would align the Sun precisely with the galactic equator at the 2012 winter solstice. Jenkins claimed that the classical Maya anticipated this conjunction and celebrated it as the harbinger of a profound spiritual transition for mankind. New Age proponents of the galactic alignment hypothesis argued that, just as astrology uses the positions of stars and planets to make claims of future events, the Maya plotted their calendars with the objective of preparing for significant world events. Jenkins attributed the insights of ancient Maya shamans about the Galactic Center to their use of psilocybin mushrooms, psychoactive toads, and other psychedelics. Jenkins also associated the Xibalba be with a "world tree", drawing on studies of contemporary (not ancient) Maya cosmology.
==== Criticism ==== Astronomers such as David Morrison argue that the galactic equator is an entirely arbitrary line and can never be precisely drawn, because it is impossible to determine the Milky Way's exact boundaries, which vary depending on clarity of view. Jenkins claimed he drew his conclusions about the location of the galactic equator from observations taken at above 11,000 feet (3,400 m), an altitude that gives a clearer image of the Milky Way than the Maya had access to. Furthermore, since the Sun is half a degree wide, its solstice position takes 36 years to precess its full width. Jenkins himself noted that even given his determined location for the line of the galactic equator, its most precise convergence with the center of the Sun already occurred in 1998, and so asserts that, rather than 2012, the galactic alignment instead focuses on a multi-year period centered in 1998. There is no clear evidence that the classic Maya were aware of precession. Some Maya scholars, such as Barbara MacLeod, Michael Grofe, Eva Hunt, Gordon Brotherston, and Anthony Aveni, have suggested that some Mayan holy dates were timed to precessional cycles, but scholarly opinion on the subject remains divided. There is also little evidence, archaeological or historical, that the Maya placed any importance on solstices or equinoxes. It is possible that only the earliest among Mesoamericans observed solstices, but this is also a disputed issue among Mayanists. There is also no evidence that the classic Maya attached any importance to the Milky Way; there is no glyph in their writing system to represent it, and no astronomical or chronological table tied to it.
=== Timewave zero and the I Ching ===