www.hispanicbusiness.com/news/2008/9/22/unequal_equinox -
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Published on: 9/22/2008
Last Visited: 9/23/2008
That's according to Chris Pagan, planetarium director at the Tulsa Air and Space Museum, who noted the sun at that point will begin its southward movement from the equator and away from the Northern Hemisphere.
In other words, it's going to start getting cold real soon.
Pagan said the movement of the sun directly over the equator happens only one other time in the year, and that's in March, marking the beginning of spring.
Now all this talk about the equinox may seem of little importance nowadays, but for ancient civilizations the movements of that fiery ball in the sky was a big deal, Pagan said.
The equinox, in particular, signaled when it was time to plant crops or when it was OK to harvest them, Pagan said.
There were some cultures which used the movements of the moon for their livelihood and existence, but, for the most part, it has been the sun that has
been used by civilizations since before the birth of Christ, Pagan said.
The French, Pagan said, had an unusual spin on the autumn equinox.
Between 1783 and 1805, France marked the beginning of the new year with the September equinox, Pagan said.It was Napoleon who trashed the practice, he noted.
The movements of the sun also help form the basis of the Gregorian calendar -- the calendar used by much of the world, Pagan said.
The word equinox may sound like Greek to many people, but it's actually a Latin word, which means "equal night."
And there is one misconception of the equinox, Pagan said.
When the sun is directly over the equator, many people think that daytime and nighttime are of equal duration on that particular day.
Not so, Pagan said.
For the autumn equinox, he said, the balance between night and day occurs a couple of days later; for the spring equinox, the balance takes place a few days earlier.
Much of that has to do with the Earth's yearly orbit around the sun.
Most people tend to think there are only 365 days in a year, but Pagan noted the precise count is 365 and one-fourth days for the year.