How and Why is a solar eclipse?

November 19, 2011 14:53

How and Why is a solar eclipse?Probably everyone in my life has ever heard or seen such a thing as a solar eclipse. And if you ask yourself the question, where does it come from, what are its causes, in general, what is this phenomenon of nature?

The first such phenomena were observed by mankind even in the very old. Previously, people with a solar eclipse, lost and felt the wild terror of this enigmatic phenomenon. As a rule, among the people there were a belief that at this moment a terrible dragon trying to destroy the sun and should be protected. As did the solar eclipse does not last long, the plan of local residents always worked. They were armed with weapons of war and went to "war" after the street lightening, people return to their home calm and happy, that drove the evil spirits and save the sun.

It is also known that the first eclipse in history was during the reign of Chung-Kang, the fourth emperor of the dynasty-hyun. To this period is timed entry in one of the books of ancient China — "Shutszin" ("Book of History"). The date of the solar eclipse found only in the nineteenth century — October 22, 2137 BC. e.

By the way, every solar eclipse in some way connected with historical events. So, it occurred on August 3 in 431 BC. e. during the Peloponnesian War in Greece. Establishing the exact date of the eclipse helped to restore some aspects of the war, including the date and time. Solar eclipse, which happened at that time, was not complete.

Today it is well established that there is a solar eclipse. Is a phenomenon of nature, the essence of which is that the moon eclipses the sun. The appearance of a solar eclipse is because when the Moon and the Sun Earth line up in a straight line, and there is a new moon.

So that the astronomical phenomenon is not every new moon. Depending on how the moon covers the sun, emit a full or partial eclipse. Of course, the whole thing in the moon's shadow, which can be of different sizes, and the person who is on the surface of the Earth and into the shadow zone, will be able to see a total solar eclipse.

The duration of this astronomical phenomenon is only a few minutes as the speed of the Moon's shadow is 1 km / s, at least. Full cycle of the eclipse is 6 hours, but the beginning of his picks in the western part of the land at sunrise and ends at the eastern part during approach.

Naturally, when you see a partial eclipse is not the same effect as the total eclipse. Astronomers also produce annular solar eclipse, the essence of which is that the Moon passes by the Sun and a diameter less than the latter, it appears that during the eclipse of the Sun can be seen in a circle.

The frequency of a solar eclipse, usually 2-5 eclipses per year. But not always all of these phenomena will be exactly full solar eclipse. Astrologers predict that the longest total solar eclipse will occur July 16, 2186 g, and it will be time — 7 minutes 29 seconds. I would like to bring the chronology of solar eclipses in the last 10 years. It's over, there will be are not all instances of this phenomenon, but the most basic.

1. February 5, 2000 — partial solar eclipse.

2.21 in June 2001 — a total solar eclipse. Can best see the people who were at this point in the equatorial part of the southern hemisphere. The width of the Moon's shadow during an eclipse was 200 kilometers, and the length — 373 320 km. Time: 12:04:46;

3. June 10, 2002, an annular solar eclipse. The best visibility in the Northern Hemisphere. Duration of approximately 23 seconds. The width of the shadow of archery was only 13 kilometers, and the length-373 320 km. Event time: 23:45:22.

4. May 31, 2003 — partial solar eclipse. Start time: 9:30:17. Location — Barnaul.

5. October 3, 2005 — annular eclipse. The maximum phase can be observed in the area south of Europe (Portugal and Spain) and Africa.

6. March 29, 2006 there was a total solar eclipse, which is well observed in the western part of Russia.

7. March 19, 2007 — partial solar eclipse that can be seen in North America.

8. August 1, 2008 — a total solar eclipse, the active phase of which took place at the Novosibirsk. Start time — 17:44:02. Duration — 2 minutes 18 seconds.

9. July 22, 2009 — a total solar eclipse. It was good to see all over the world — India, Nepal, Bhutan, Myanmar, Bangladesh and others.

10. January 15, 2010 — annular solar eclipse.

11. 4 January 2011 — partial solar eclipse. Place — the northern hemisphere. Beginning at 10:38. Such a phenomenon is humanity can observe only in 2015.

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