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Saturday, January 16, 2010

Longest solar eclipse for 1,000 years turns Sun into a blazing ring of fire












By Daily Mail Reporter
Last updated at 12:41 AM on 16th January 2010




The sun is reduced to a ring of gold against the black sky as the Moon slips between it and Earth.

This solar eclipse yesterday lasted for 11 minutes and eight seconds, setting a record that will not be beaten until December 23, 3043.

Such events, which only blot out the middle of the Sun, are known as annular eclipses. They occur about 66 times a century and can only be viewed in the narrow band on the Earth’s surface below their path.


Enlarge A Chinese couple watches the solar eclipse over Zhengzhou, in the country's central Henan province

A Chinese couple watches the solar eclipse over Zhengzhou, in the country's central Henan province
Enlarge solar eclipse

The skies over Hongdao, China, where the spectacular 'ring of fire' could be seen. The eclipse was annular, meaning the Moon blocked most of the Sun's middle

WHAT IS AN ANNULAR ECLIPSE?

Not every eclipse of the Sun is a total eclipse. On occasion the Moon is too small to cover the whole of the Sun. This is because of the Moon's orbit around Earth which is oval or elliptical in shape.

This means that as the Moon orbits Earth its distance varies from about 221,000 to 252,000 miles. This 13 per cent variant makes its apparent size, from our perspective, vary by the same amount.

It is this effect that leads to the difference between total and annular eclipses. When the Moon is on the near side of its orbit, it will block out all of the Sun's light resulting in a total eclipse.

This will only be experienced at a specific point on Earth where a shadow cast by the Moon, called an umbra, reaches our planet.

However, if an eclipse occurs while the Moon is on the far side of its elliptical orbit, it appears smaller than the Sun and can't completely cover it. When this happens, the umbra cannot reach Earth and an antumbra shadow is created over the planet's surface.

The track it creates is called the path of annularity. If you are within this path, you will see an annular eclipse where, at its maximum phase, a ring (annulus) of sunlight surrounds the Moon.

Yesterday’s light show began in Africa before crossing the Indian Ocean, where it reached its peak at about 7am GMT.

It then continued into Asia where it could be seen in the Maldives, southern India, parts of Sri Lanka, Myanmar and China.

In other parts of Africa as well as the Middle East and Eastern Europe, skywatchers were treated to a partial eclipse.

In India, the phenomenon gave an extra auspicious edge to the Kumbh Mela festival, where thousands of people immerse themselves in the Ganges river, an act believed to purge all sins.

‘Taking a holy dip during the solar eclipse is a very pious act,’ said Hindu priest Babu Ram Sashtri from the banks of the Ganges.

‘It is very auspicious. It is very fruitful and it can get one salvation.’


People offer prayers to the Sun God as they bathe during solar eclipse at the Kumbh fair in Haridwar, India, Friday, Jan. 15, 2010. According to Hindu mythology Kumbh is celebrated in four places in India where drops of nectar of life is said to have fallen during a tug of war between the gods and demons in ancient times and bathing there in astrologically significant times absolves one of sins and helps in salvation. Additionally devoted Hindus traditionally take a bath in holy water during and after eclipse.
(AP Photo/Saurabh Das)

The eclipse sent sea birds in Sri Lanka looking for a place to roost for the night – shortly after lunchtime.

'Many amateur astronomers have taken time off work and spent a lot on money on travel to see it,' said Lin Qing, head of the Sheshan Station of Shanghai Astronomical Observatory in China.
umbra shadow

This image show a total solar eclipse which passed over Europe and the Middle East, and into India. The Moon's umbra can be clearly seen as a black disc, approximately 63 miles across

solar eclipse
Enlarge solar eclipse

The best view of the eclipse was in the Maldives (left). A man in Hongdao in China's Shandong province (right) views the eclipse through filter glasses
The narrow red band shows where the eclipse could be seen today

The narrow red band shows where the eclipse could be seen today

'We will travel across China simply to witness the magnificent astronomical phenomena,' she added.

The eclipse, the first of its kind to cross over Sri Lanka since 1955, sent sea birds along the oceanside capital of Colombo looking for a place to roost for the night, shortly after lunchtime.

A pelican looped over the city as the skies darkened from the north and the eclipse neared its peak.

'Wow, it's marvellous,' said an army officer, who was on security duty in Sri Lanka's capital Colombo.

'This is the first time I have seen this kind of eclipse.'

According to astronomical websites, the last annular eclipse occurred roughly one year ago on January 26, 2009. The next one will happen May 20, 2012.

Read more: http://www.dailymail.co.uk/sciencetech/article-1243436/Solar-Eclipse-January-2010-Sun-turns-blazing-ring-glory.html#ixzz0clpQW2AL

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