Once in ten years! On Sunday, there will be solar eclipses in many parts of the country, with 70.9percent of the total area covered by Shanghai food

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 Once in ten years! On Sunday, there will be solar eclipses in many parts of the country, with 70.9percent of the total area covered by Shanghai food


Image from heavens- above.com Website.

How should citizens observe solar eclipse?

Cowen: we should pay attention to observation. First of all, we cant use the eye to see the sun directly, let alone the telescope without anti glare protection. Otherwise, the eye will suffer irreparable damage in an instant. In case of direct observation with the naked eye, special solar eclipse glasses shall be worn (usually with bard film for light reduction); in case of telescope observation or photography, Bard film, oaks and other light reduction films shall be installed in front of the objective lens. The dimmer shall be fixed firmly to prevent it from being blown off by the wind. Usually, in the whole process of observing the annular eclipse and partial eclipse, the dimming device is used.

There are many unprofessional ways for people to watch the eclipse, which is not recommended. For example, bake the glass on the fire and use it to watch the solar eclipse after blackening; use the used film, X-ray film and other light reduction devices; and use the goggles for the welding workers. This kind of non professional equipment can reduce the visible light, but there are many invisible light in the sun, which will cause damage to the eyes. Unprofessional methods cant be like professional eclipse glasses, which can reduce the visible light and block the invisible light harmful to the eyes at the same time.

Image from heavens- above.com Website.

Can this eclipse be called once in ten years?

Cowen: globally, there are several solar eclipses every year, sometimes once, up to five. But its just for the world. Solar eclipse is only in a small area. As an individual, in a certain city, when there is a solar eclipse, you may not be able to see it. From this point of view, this eclipse is relatively rare. In particular, total solar eclipse and annular solar eclipse occur in a smaller scope. Although this is an annular eclipse, most parts of China can see partial eclipses. The annular eclipse can only be seen in a narrow strip about 30-40 kilometers wide.

Chinas last annular eclipse occurred in 2012, and the next annular eclipse will wait until 2030. Moreover, it is of little significance in China. For example, the next annular eclipse in 2030 will take place in a narrow area near the Heihe River in Northeast China. If we only talk about Shanghai, it is possible to wait until the next annular eclipse for decades or hundreds of years. Every time there is a total eclipse or an annular eclipse, everyone will take action and run to the annular eclipse belt. Last December, there was an annular eclipse. Many people chose to go to Southeast Asia and India for observation. This eclipse is really rare. Its not too much to describe it as once in ten years.

Why is it called Phnom Penh eclipse?

(function(){( window.slotbydup=window .slotbydup||[]).push({id:u6056789,container:ssp_ 6056789, async:true }The solar eclipse includes partial eclipse, annular eclipse and total eclipse, among which the total eclipse is the most shocking: when it is dark in the daytime, stars can appear in the sky, and it will be bright again in a few minutes. There was a total solar eclipse in theory in Shanghai in 2009. I was preparing to observe it in Jiaxing, Zhejiang Province. Unexpectedly, it rained heavily that day, and the observation failed. I cant feel it very clearly, let alone look at the stars. The next days annular eclipse is slightly different from the previous years. Although it is an annular eclipse, the sun is covered by a large area. When the eclipse is close to the total eclipse, 98% of the sun will be covered. Therefore, there is a suspense about this annular eclipse, and there will be a very thin trace left in the annular eclipse. This has two effects: one is that the duration of the annular eclipse will be very short, no more than one minute. On the other hand, under such a large cover area, the sky will certainly turn black, but whether there will be stars, whether there will be a solar prominence or a chromosphere layer are all suspense. Source: Shangguan news editor in charge: Shi Chunlei_ 001

Cowen: eclipses include partial eclipses, annular eclipses and total eclipses, among which total eclipses are the most shocking: when its dark in the daytime, stars can appear in the sky, and its bright again in a few minutes. There was a total solar eclipse in theory in Shanghai in 2009. I was preparing to observe it in Jiaxing, Zhejiang Province. Unexpectedly, it rained heavily that day, and the observation failed. I cant feel it very clearly, let alone look at the stars.

The next days annular eclipse is slightly different from the previous years. Although it is an annular eclipse, the sun is blocked by a very large area. When the food is close to the total eclipse, 98% of the sun will be covered. Therefore, there is a suspense about this annular eclipse, and there will be a very thin trace left in the annular eclipse. This has two effects: one is that the duration of the annular eclipse will be very short, no more than one minute. On the other hand, under such a large cover area, the sky will certainly turn black, but whether there will be stars, whether there will be a solar prominence or a chromosphere layer are all suspense.