Search Results - Equinox
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In astronomy, equinox can have two meanings An equinox in astronomy is that moment in time (not a whole day) when the centre of the Sun can be observed to be directly above the Earth's equator, occurring around March 20 and September 23 each year. More technically, at an equinox, the Sun is at one of two opposite points on the celestial sphere where the celestial equator (i.e., declination 0) and ecliptic intersect. These points of intersection are called equinoctial points—the vernal point and the autumnal point. By extension, the term equinox may be used to denote an equinoctial point. There is either an equinox (autumn and spring) or a solstice (summer and winter) on approximately the 21st day of the last month of every quarter of the calendar year. On a day which has an equinox, the centre of the Sun will spend a nearly equal amount of time above and below the horizon at every location on Earth and night and day will be of nearly the same length. The word equinox derives from the Latin words aequus (equal) and nox (night). In reality, the day is longer than the night at an equinox. Commonly, the day is defined as the period that sunlight reaches the ground in the absence of local obstacles. From Earth, the Sun appears as a disc and not a single point of light; so, when the centre of the Sun is below the horizon, the upper edge is visible. Furthermore, the atmosphere refracts light; so, even when the upper limb of the Sun is below the horizon, its rays reach over the horizon to the ground. In sunrise/sunset tables, the assumed semidiameter (apparent radius) of the sun is 16 minutes of arc and the atmospheric refraction is assumed to be 34 minutes of arc. Their combination means that when the upper limb of Sun is on the visible horizon its centre is 50 minutes of arc below the geometric horizon, which is the intersection with the celestial sphere of a horizontal plane through the eye of the observer. These effects together make the day about 14 minutes longer than the night at the equator, and longer still at sites toward the poles. The real equality of day and night only happens at places far enough from the equator to have at least a seasonal difference in daylength of 7 minutes, and occurs a few days towards the winter side of each equinox.
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Showing 1 to 11 of 11 Articles matching 'Equinox' in related articles. |
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1. From Zero to Million with Your Home Business
May 12, 2008
Have you ever heard of the phrase: "There ain't no business like show business."
Well, guess again! Welcome to Internet Marketing - the Business of the 21th century.
If you are wondering how to make a million with simply running a business from home, then this article will be your first step towards achieving your goals.
But starting a business from home without a business plan is suicide. Just as you have to plan your route for a journey, you will have to plan the route for your business as well. Without a planned route as a guide you will not know whether you are heading i... (read more)
Author: Equinox ToYou
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2. Contact Lenses That Make Your Eyes Appear Whiter
May 05, 2008
As I continue to be in search of the “Brightest White Eyes”, I came across a product that will knock your socks off. I never considered that I would be writing a review on contact lenses. Meet Equinox Allure Contacts by Marietta Vision . You may think that it sounds to good to be true! When you apply these highly unique contact lenses, instantaneously you notice yours eyes appearing much enhanced & whiter. These types of contact lenses are actually referred to as a Cosmetic enhancement lenses. The “Allure” contacts have a very natural looking black rim called a “Blacklimbal Ring” on t... (read more)
Author: Carol Clifton
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3. A Homeschooler's Groundhog Day: The Groundhog Day Story
October 17, 2007
Groundhog Day is held on the second of February each month. This day is considered a cross-quarter day, falling between the Winter Solstice and the Vernal Equinox.
It is said that if the groundhog emerges from its burrow on the second of February and sees its shadow, the groundhog will be frightened and retreat back into its den. Then, America will receive six more weeks of winter. If the groundhog does not see its shadow, we can expect an early spring.
German and French, and Celtic beliefs have influenced this notion. The superstition has its roots in the pagan belief that animals... (read more)
Author: Mimi Rothschild
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4. Delsey Luggage Is Rolling
September 22, 2007
Delsey equinox is lightweight luggage designed with the busy traveler in mind. The luggage features a lightweight Dura-Flex frame made of space age honeycomb composite. The fabric is constructed of Dura Ballistic with Eva form backing. The interior is fully lined and has a removable suiter with suiter clip. There are also multiple pockets for easy storage. The bottom foot handle makes lifting easy and there also a side handle for removing the case from inside automobiles, etc. The Equinox case features self-repairing interlocking #10 nlyon coil zippers on the main openings. The recessed... (read more)
Author: maxine greco
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5. Smith Chevrolet Cadillac is a Chevrolet Dealer in Fort Smith, Arkansas which Offer Best Service for
August 23, 2007
Smith Chevrolet Cadillac is a Chevy dealer in Fort Smith, Arkansas. Its location enables the dealership to serve customers in and around Barling, Arkoma, Van Buren, Greenwood, Roland, Pocola, Cedarville and Moffett.
Smith Chevrolet Cadillac has a large collection of new and certified used vehicles of Chevrolet makes including Chevy Avalanche, Aveo, Corvette, Silverado, Suburban, Equinox, Tahoe, TrailBlazer, Cobalt, HHR, Colorado, Impala, Monte Carlo and Uplander. The dealership also exhibits Cadillac models like the CTS, CTS-V, DTS, STS, STS-V, XLR, XLR-V, SRX, Escalade, Escalade ESV and ... (read more)
Author: smith w
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6. The Groundhog Day Story
May 09, 2007
Groundhog Day is held on the second of February each month. This day is considered a cross-quarter day, falling between the Winter Solstice and the Vernal Equinox.
It is said that if the groundhog emerges from its burrow on the second of February and sees its shadow, the groundhog will be frightened and retreat back into its den. Then, America will receive six more weeks of winter. If the groundhog does not see its shadow, we can expect an early spring.
German and French, and Celtic beliefs have influenced this notion. The superstition has its roots in the pagan belief that a... (read more)
Author: Mimi Rothschild
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7. How Time Affects Writing
March 23, 2007
You may not really think about it, but depending on the equinox, you may be using the wrong terms – specifically daylight time versus standard time. When does it start, when does it apply and how do we know? Especially, this year when many of us sprung into daylight savings time almost 3 weeks early! Does it really make a difference if we say daylight or standard time? Well it can and it’s especially important to pay attention to differences when you’re planning meetings that will be attended by people all over the world. That is something that never used to be a consideration – can you imagin... (read more)
Author: Laurie Dart
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8. Let Your Light Out!
November 03, 2006
Here in the northern hemisphere, we've passed the autumnal equinox; the days are shorter than the nights, and getting ever more so, till the solstice in December. Although I enjoy this time of year – I like the cooler weather, the changes in my garden, and anticipating the holidays – I still miss the long days of spring and summer. And as the light dwindles, I seem to be getting increasingly phototropic: like a plant, I find myself turning towards the light.
There are many forms of light in our lives: the ebb and flow of natural daylight versus the on-demand brilliance of artificial l... (read more)
Author: Grace Judson
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9. Audubon Equinox HP Binoculars, one of your best choices
August 25, 2006
Starting from the fact that the “HP” part of the name of those binoculars stands for “High Performance” it is definitely expected that the new, improved Audubon Equinox HP binoculars have something really interesting to tell us. Sheltered Wings .Inc, the manufacturer, have done a really good job with those binoculars; not only are we satisfied to see a few optical improvements but the new, revised models feature some neat, ergonomic improvements too.
Specifically, the eye cups have been remodeled and the twisting mechanism now features an intermediate position which allows for extra fle... (read more)
Author: John Gibb
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10. Let Us Learn Giving From Mother Earth
April 10, 2006
Earth the great giver. What can we learn from the Earth? The world celebrates earth day in different ways. In the United States of America, it is observed on the 22nd April, while the international earth day is celebrated on the day of Vernal Equinox .
The day is observed to make all of us aware of our responsibilities towards our mother earth. The way we have been taking all that we can from the earth will one day finish all the coal and hydrocarbon from the earth. Same with all the minerals. We are extracting what all we can. The earth is our greatest friend but we earthlings behave as ... (read more)
Author: cd mohatta
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11. Easter Symbolism, Tradition, and the Easter Basket
March 12, 2006
Celebrated on the Sunday following the first full moon after the spring equinox, Easter is a celebration of many things. Traditionally Easter is a Christian holiday celebrating Christ’s resurrection, but today many people celebrate Easter also as a time of renewal and hope. One of the first spring holidays, Easter is a perfect time to shake off the winter hibernation, don a new hat and welcome the anticipated warmer weather. In recent decades gift giving during this spring time celebration has seen a steady increase as people share the joy of the season with their loved ones young and old. ... (read more)
Author: Sharon Lauer
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