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Encyclopedia > Autumnal equinox
Illumination of Earth by Sun on the day of equinox
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Illumination of Earth by Sun on the day of equinox

The autumnal equinox (or fall equinox) marks the beginning of astronomical autumn. It occurs during the month of September in the Northern Hemisphere, and during March in the Southern Hemisphere. In Chinese culture it marks the middle of autumn. At the same moment that the autumnal equinox occurs in one hemisphere, it is the time of the vernal equinox in the other hemisphere. Image File history File links Download high resolution version (1560x1024, 392 KB) Illumination of Earth by Sun on the day of equinox (vernal and autumnal). ... Image File history File links Download high resolution version (1560x1024, 392 KB) Illumination of Earth by Sun on the day of equinox (vernal and autumnal). ... Earth is the current Good Article Collaboration of the week! Please help to improve this article to the highest of standards. ... The Sun is the star at the center of Earths solar system. ... An equinox in astronomy is the moment when the Sun passes over the equator. ... Fall redirects here. ... Insert non-formatted text here The Northern Hemisphere is the half of a planets surface (or celestial sphere) that is north of the equator (the word hemisphere literally means half ball). On the Earth, the Northern Hemisphere contains most of the land and population. ... Southern Hemisphere The Southern Hemisphere is the half of a planets surface (or celestial sphere) that is south of the equator (the word hemisphere literally means half ball). On Earth it contains five continents (Antarctica, Australia, most of South America, parts of Africa, and Asia) as well as four... Illumination of Earth by Sun on the day of equinox The vernal equinox (or spring equinox) marks the beginning of astronomical spring. ...


In 2006, the autumnal equinox of the Northern Hemisphere falls on September 23 at 04:03 UTC[1][2]. In the Southern Hemisphere the equinox occurs at 18:26 UTC on 20 March. 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... The September equinox is the equinox which occurs in the month of September. ... September 23 is the 266th day of the year (267th in leap years). ... March 20 is the 79th day of the year in the Gregorian Calendar (80th in Leap years). ...

Contents


Astronomy

UTC Date and Time of Solstice and Equinox
year Equinox
Mar
Solstice
June
Equinox
Sept
Solstice
Dec
day time day time day time day time
2002 20 19:16 21 13:24 23 04:55 22 01:14
2003 21 01:00 21 19:10 23 10:47 22 07:04
2004 20 06:49 21 00:57 22 16:30 21 12:42
2005 20 12:33 21 06:46 22 22:23 21 18:35
2006 20 18:26 21 12:26 23 04:03 22 00:22
2007 21 00:07 21 18:06 23 09:51 22 06:08
2008 20 05:48 20 23:59 22 15:44 21 12:04
2009 20 11:44 21 05:45 22 21:18 21 17:47
2010 20 17:32 21 11:28 23 03:09 21 23:38
2011 20 23:21 21 17:16 23 09:04 22 05:30
2012 20 05:14 20 23:09 22 14:49 21 11:11
2013 20 11:02 21 05:04 22 20:44 21 17:11
2014 20 16:57 21 10:51 23 02:29 21 23:03

The Celestial Equator and the Ecliptic are two Great Circles. As such, they intersect at two points, the Equinoxes. When the Sun, which moves along the Ecliptic, occupies the point that crosses the Equator while heading south, it is the time of the Autumnal Equinox. UTC also stands for the University of Tennessee at Chattanooga Coordinated Universal Time or UTC, also sometimes referred to as Zulu time, the basis for civil time, differs by an integral number of seconds from atomic time and a fractional number of seconds from UT1. ... Image File history File links Celestial_Equator. ... Image File history File links Celestial_Equator. ... The celestial equator is a great circle on the imaginary celestial sphere, which could be constructed by inflating the Earths equator until it intersects with said sphere. ... The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ...


Due to the Precession of the Equinoxes, the point of intersection moves completely around the sky in a 25,800-year cycle. This century it is in the western end of Virgo near the star Zavijava (β Vir) and moving slowly toward Leo. Precession refers to a change in the direction of the axis of a rotating object. ... Virgo (Latin for virgin, symbol , Unicode ♍) is a constellation of the zodiac. ... Zavijava (also Zavijah)ist the name of the star Beta Virginis in the constellation virgin. ... Leo (Latin for lion, symbol , Unicode ♌) is a constellation of the zodiac. ...


Holidays

Autumnal Equinox Day (秋分の日, Shūbun no hi) is an official national holiday in Japan, and is spent visiting family graves, and holding family reunions. // Public Holiday law The Public Holiday Law (国民の祝日に関する法律 Kokumin no Shukujitsu ni Kansuru Hōritsu) of 1948 (as amended) establishes the occasions on which Japan has a legal holiday. ...


In the UK Harvest festival falls around this time. Thanksgiving ceremonies and celebrations for a successful harvest are both worldwide and very ancient. ...


The autumnal equinox is when the Wiccan Sabbat of Mabon is celebrated. This article or section does not cite its references or sources. ... In the Wiccan form of neopaganism, a Sabbat is one of the eight major seasonal festivals which make up the Wheel of the Year. ... Mabon is one of the eight solar holidays or sabbats of American Neopaganism. ...


Autumnal Equinox Day is also "New Year's Day" in the French Republican Calendar, which was in use from 1793 to 1805. The French First Republic was proclaimed and the French monarchy was abolished on September 21, 1792, making the following day, Autumnal Equinox Day that year, the first day of the "Republican Era" in France. For information on the movie, New Years Day, see New Years Day (film). ... The French Republican Calendar or French Revolutionary Calendar is a calendar proposed during the French Revolution, and used by the French government for about twelve years from late 1793. ... The French people proclaimed Frances First Republic on 21 September 1792 as a result of the French Revolution and of the abolition of the French monarchy. ... Kings ruled in France from the Middle Ages to 1848. ... September 21 is the 264th day of the year (265th in leap years). ... 1792 was a leap year starting on Sunday (see link for calendar). ...


The solar term Qiufen in Chinese astronomy

Qiufen (秋分) is a solar term which begins when Sun lies between the celestial longitude of 180° and 195°. It sometimes refers in particular to the day when Sun exactly at the celestial longitude of 180°. It usually begins around September 23, and ends around October 8. A Solar term is one of 24 days in the traditional East Asian lunisolar calendars that match a particular astronomical events or signify some natural phenomenon. ... Right ascension (RA; symbol α: Greek letter alpha; celestial longitude) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... September 23 is the 266th day of the year (267th in leap years). ... October 8 is the 281st day of the year (282nd in leap years). ...

Preceded by:
Bailu
Solar term Succeeded by:
Hanlu

Bailu (白露) is a solar term begins when Sun lies between the celestial longitude of 165° and 180°. It sometimes refers in particular to the day when Sun exactly at the celestial longitude of 165°. Introduction Bailu usually begins around September 8, and ends around September 23. ... A Solar term is one of 24 days in the traditional East Asian lunisolar calendars that match a particular astronomical events or signify some natural phenomenon. ... Hanlu (寒露) is a solar term begins when Sun lies between the celestial longitude of 195° and 210°. It sometimes refers in particular to the day when Sun exactly at the celestial longitude of 195°. Introduction Hanlu usually begins around October 8, and ends around October 23. ...

See also

An equinox in astronomy is the moment when the Sun passes over the equator. ... Illumination of Earth by Sun on the day of equinox The vernal equinox (or spring equinox) marks the beginning of astronomical spring. ... The March equinox is the equinox which occurs in the month of March. ... The September equinox is the equinox which occurs in the month of September. ... Diagram of the Earths seasons Solstice is an astronomical term regarding the position of the Sun in relation to the earths equator. ... Illumination of Earth by the sun on the northern hemisphere summer solstice The summer solstice is an astronomical term regarding the position of the sun in relation to the celestial equator. ... Illumination of Earth by Sun on the day of the northern hemisphere winter solstice Illumination of Earth by Sun on the day of the southern hemisphere winter solstice In astronomy, the winter solstice is the moment when the earth is at a point in its orbit where one hemisphere is...

References


  Results from FactBites:
 
Autumnal equinox - Wikipedia, the free encyclopedia (387 words)
At the same moment that the autumnal equinox occurs in one hemisphere, it is the time of the vernal equinox in the other hemisphere.
In 2006, the autumnal equinox of the Northern Hemisphere falls on September 23 at 04:03 UTC
In the Southern Hemisphere the equinox occurs at 18:26 UTC on 20 March.
  More results at FactBites »

 
 

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