Winter Solstice - December 21
In astronomy, the winter solstice is the moment when the earth is at a point in its orbit where one hemisphere is most inclined away from the sun. This causes the sun to appear at its farthest below the celestial equator when viewed from earth. Solstice is a Latin borrowing and means "sun stand", referring to the appearance that the sun's noontime elevation change stops its progress, either northerly or southerly. The day of the winter solstice is the shortest day and the longest night of the year.
In the northern hemisphere, the winter solstice usually falls on December 21/December 22, which is the southern hemisphere's summer solstice. At this time, the sun appears over the Tropic of Capricorn, roughly 23.5 degrees South of the earth's equator. In the southern hemisphere, winter solstice falls on June 21/June 22, which is the northern hemisphere's summer solstice. At this time, the sun appears over the Tropic of Cancer.
Since the winter solstice, summer solstice, vernal equinox, and autumnal equinox were probably observed for the first time by people in the northern hemisphere, these naming conventions originally corresponded to the northern hemisphere's seasons. In most reckonings, the winter solstice is midwinter. In Ireland's calendar, the solstices and equinoxes all occur at about midpoint in each season. For example, winter begins on November 1, and ends on January 31.
No one is really sure how long ago humans recognized the winter solstice and began heralding it as a turning point -- the day that marks the return of the sun to the northern hemisphere.
Many cultures the world over perform solstice ceremonies. At their root -- an ancient fear that the failing light would never return unless humans intervened with anxious vigil or antic celebration.
There's much new scholarship about Neolithic peoples and their amazing culture. For example, it now looks as though writing is much more ancient than we earlier thought -- as much as 10,000 years old. Neolithic peoples were the first farmers. Their lives were intimately tied to the seasons and the cycle of harvest - which would mean that they were attuned to the movement of celestial objects and seasons. Scholars have not as yet found proof, though, that these peoples had the skill to pinpoint a celestial event like a solstice. Earliest markers of time, found from these ancient peoples are notches carved into bone that appear to count the cycles of the moon. But perhaps they watched the movement of the sun as well as the moon, and perhaps they celebrated it -- with fertility rites, with fire festivals, with offerings and prayers to their gods and goddesses.
Most ancient cultures built Astronomical Observatories - tombs, temples, cairns among others, to align with the solstices and equinoxes.
Stonehenge - marker of the summer and winter solstices.
Newgrange
The passage and chamber of Newgrange are illuminated by the winter solstice sunrise. A shaft of sunlight shines through the roof box over the entrance and penetrates the passage to light up the chamber. The dramatic event lasts for 17 minutes at dawn from the 19th to the 23rd of December. The light illuminates a stone basin below intricate carvings -- spirals, eye shapes, solar discs. Although not much is known about how Newgrange was used by its builders, marking the solstice was obviously of tremendous spiritual importance to them.
Maeshowe, on the Orkney Islands north of Scotland, shares a similar trait, admitting the winter solstice setting sun. It is hailed as one of the greatest architectural achievements of the prehistoric peoples of Scotland.
Hundreds of other megalithic structures throughout Europe are oriented to the solstices and the equinoxes. The blossoming field of archaeoastronomy studies such sacred sites in the Americas, Asia, Indonesia, and the Middle East.
Recent research into the medieval Great Zimbabwe in sub-Saharan Africa (also known as the "African Stonehenge") indicates a similar purpose.
In North America, one of the most famous such sites is the Sun Dagger of Chaco Canyon, New Mexico, built a thousand years ago by the Chacoans, ancestors of the Pueblo people.
Even cultures that followed a moon-based calendar seemed also to understand the importance of these sun-facing seasonal turning points.
The book, The Sun in the Church reveals that many medieval Catholic churches were also built as solar observatories. The church, once again reinforcing the close ties between religious celebration and seasonal passages, needed astronomy to predict the date of Easter. And so observatories were built into cathedrals and churches throughout Europe. Typically, a small hole in the roof admitted a beam of sunlight, which would trace a path along the floor. The path, called the meridian line, was often marked by inlays and zodiacal motifs. The position at noon throughout the year, including the extremes of the solstices, was also carefully marked.
The winter solstice is the time when the Germanic festival of Yule was celebrated; it is celebrated today as a Neopagan Sabbat. Christmas was transplanted into winter solstice about 1,600 years ago, centuries before the English language emerged from its Germanic roots.
Yule is the time of greatest darkness and the longest night of the year. The Winter Solstice had been associated with the birth of a "Divine King" long before the rise of Christianity. Since the Sun is considered to represent the Male Divinity in many Pagan Traditions, this time is celebrated as the "return of the Sun God" where He is reborn of the Goddess.
Many cultures celebrate or celebrated a holiday near (within a few days) the winter solstice; examples of these include Yalda, Saturnalia, Christmas, Karachun, Hanukkah, Festivus, Kwanzaa, and Human Light. In her fiction, Ursula K. Le Guin calls the solstice celebration "The Festival of Sun Return".
Through an interesting coincidence in the Earth's orbit, the northern hemisphere's winter occurs when the sun is actually closest to the Earth. Conversely, the northern summer is when the sun is farthest from the Earth. But the distance from the sun doesn't affect the seasons on Earth to a measurable amount, since Earth's elliptical orbit is the closest to circular of all of the planets in the solar system. In general it's the angle of the sun's rays and the number of hours of light per day that actually affects the seasons in most regions on the planet.
Native Americans have winter solstice rites. The sun images at right are from rock paintings of the Chumash, who occupied coastal California for thousands of years before the Europeans arrived. Solstices were tremendously important to them, and the winter solstice celebration lasted several days.
In Iran, there is the observance of Yalda, in which families kept vigil through the night and fires burned brightly to help the sun (and Goodness) battle darkness (thought evil).
Winter solstice celebrations are also part of the cultural heritage of Pakistan and Tibet. And in China, even though the calendar is based on the moon, the day of winter solstice is called Dong Zhi, "The Arrival of Winter." The cold of winter made an excellent excuse for a feast, so that's how the Chinese observed it, with Ju Dong, "doing the winter." In the Chinese calendar, the winter solstice is called "winter's extreme" and is traditionally regarded as one of the year's most important Jieqis, comparable to Chinese New Year.
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