The Harvest Moon is also sometimes called Corn Moon, after the corn harvest in the months of fall. The dates for this event, which is also known as equilux, depend on a location's latitude-those south of the equator celebrate it a few days before the equinox, people in the Northern Hemisphere reach the equilux a few days after the equinox. Locations that are not on the equator do get to experience equal day and night twice a year, usually a few days before or after the equinoxes. This has two reasons: the way sunrise and sunset are defined and the atmospheric refraction of sunlight. In reality, most places on Earth enjoy more than 12 hours of daylight on this day. This has led to the common misconception that everybody on Earth experiences equal day and night-12 hours of daylight and 12 hours of night time-on the day of the September equinox. The term equinox comes from the Latin words aequus, meaning equal and nox, meaning night. Most locations on Earth do not experience equal day and night on September equinox. Due to time zone differences, locations ahead of UTC may celebrate the September equinox a day later, and locations behind UTC may celebrate it a day earlier. Note: These dates are based on the time of the equinox in UTC. This means that each September equinox occurs about 6 hours later than the previous year's September equinox. The equinox dates vary because of the difference between how the Gregorian calendar defines a year (365 days) and the time it actually takes for Earth to complete its orbit around the Sun (about 365 and 1/4 days). The last September 24 equinox occurred in 1931, the next one will take place in 2303. However, in the 21st century, it will happen twice-in 20. A September 21 equinox has not happened for several millennia. While the September equinox usually occurs on September 22 or 23, it can very rarely fall on September 21 or September 24. Statue of Pope Gregory XIII Bologna, Italy. The September equinox is also known as the vernal or spring equinox in the Southern Hemisphere and is considered by astronomers as the first day of spring there. In the Southern Hemisphere, the September equinox is the vernal (spring) equinox. The fall season ends on the December solstice, when astronomical winter begins.įor meteorologists, on the other hand, fall in the Northern Hemisphere begins about 3 weeks before the September equinox on September 1 and ends on November 30. Astronomically, the September equinox is the autumnal, or fall, equinox marking the end of summer and the beginning of fall (autumn). The September equinox is on or around September 22, while the first equinox of the year, the March Equinox, takes place on or around March 21 every year.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |