Can you see the total solar eclipse in Chengcheng County, Weinan City, Shaanxi Province on August 1?

On August 1st, the local visible total solar eclipse in Shaanxi was 36 years ago.

■ A total solar eclipse of 1 minute and 35 seconds can be seen in Yijun, Baishui, Pucheng and Dali in our province.

■ A total solar eclipse can be seen in the north of the line from the west gate to the south gate of Xi 'an city wall, but not in the south.

During the total solar eclipse, the shadow of the moon on the earth is divided into two parts, the central area is called umbra, and the outer area is called penumbra.

At sunset on August 1st, the total solar eclipse will be staged in the sky! In our province, the total solar eclipse can be seen in the south of Wuqi-Ganquan line and in the north of Linyou-Xi 'an-Shangnan line.

The last total solar eclipse in Xi 'an was 36 years ago.

When talking about the upcoming total solar eclipse on August 1st, Dr. Liu Ciyuan of the National Time Service Center of the Chinese Academy of Sciences seems to have endless words: "When the total solar eclipse occurs, the sun will' disappear' alive in a twinkling, and the whole sky will turn black, and stars can be seen during the day, so the total solar eclipse is a rare and special astronomical phenomenon, and it is also the most spectacular among all astronomical phenomena.

Although 76 of the 238 solar eclipses that occur on average every hundred years are total eclipses, there are not many places where you can see the total eclipse. It presents a long belt on the earth with a width of only 3 kilometers, which is called the total eclipse belt. It is estimated that for the same point on the ground, it takes an average of 3 years to catch up with a total solar eclipse. In our province, there was only one total solar eclipse in the whole 2th century, which was on September 21st, 1941. Hanzhong and Ankang saw this one. As for Xi 'an, it can be traced back to June 21st, 1648.

Xi' an is the only big city in the total eclipse belt

Liu Ciyuan introduced that the total solar eclipse that will occur on August 1, 28 will start from the northern end of Canada in the west and enter the northern part of Xinjiang in China through the northern end of Greenland and central Russia. In China, the main areas where the whole food belt passes are Altay, Hami, Jiuquan, Zhangye, Wuwei, Zhongwei, Yijun, Baishui, Dali, Ruicheng and Lingbao, and Xi 'an is the only big city in the whole food belt. In our province, the whole food can be seen in the south of Wuqi-Ganquan-(Shanxi) Jishan line and in the north of Linyou-Xi 'an-Shangnan line. The center line of the total eclipse belt is in Heshui (Gansu), Yijun (Shaanxi), Baishui, Pucheng, Dali and Ruicheng (Shanxi), and you can see the total eclipse for 1 minute and 35 seconds. The closer to the center line of the total eclipse zone, the longer it takes to see the total eclipse.

Xi' an has a special location, just on the southern boundary of the total eclipse zone. Taking the line from the west gate to the south gate of Xi 'an city wall as the boundary, you can see the total eclipse in the north (the farther north, the longer the total eclipse time), but you can't see it in the south. Xi 'an first lost (partial eclipse began) at 18: 27, and the eclipse (maximum eclipse) was at 19: 21. last contact was already after sunset, and the elevation angle of the sun was only 4 degrees (near the horizon) when the eclipse began. Other places in our province are similar in time and height.

The first line from Baqiao to Zhangjiabao can be seen for 4 seconds.

Once in p>3 years, many people don't want to miss this rare astronomical phenomenon. Considering the high probability of sunny days, high sun and convenient transportation, the Chinese Astronomical Society will organize a delegation to observe in the desert area north of Hami, Xinjiang and Jiuquan, Gansu. There are also vast total food belts in our province, and most people don't have to run that far, such as Cry Spring on Xiyan Expressway, Wei Zhuang on Xihan Expressway or Railway, and Hanjing in pucheng county, just on the center line, where they can see the total food for 1 minute and 35 seconds; A 55-second total eclipse can also be seen on the north line of Weihe Bridge from Lintong to Xiyan Expressway; A 4-second total solar eclipse can be seen from Baqiao to Zhangjiabao.

collecting the best observation points for the total solar eclipse

in order to let the public clearly see this astronomical wonder that comes once in more than 3 years, this newspaper is now collecting the best observation points for the total solar eclipse from the public. All observation points recommended by the public will be inspected on the spot and recommended to the public after being screened by experts.

according to the preliminary analysis of experts, on the day of the total solar eclipse, the Zhangjiabao area in the northern suburb of Xi 'an will be the best observation point for the whole of Xi 'an. Since the best observation time for the total solar eclipse in Xi 'an is at sunset, experts suggest that on the day of the total solar eclipse, citizens must pay attention to it, and the observation point must be an open space with a view to the horizon and a wide area 2 degrees to the north.

In addition, the location of this total solar eclipse in Shaanxi is low (elevation angle is 4 degrees). Experts believe that this location is not the best place for scientific research and observation, but it is easy to match with the ground scenery, and it is the best area for taking clear close-up artistic photography of the sun. After the total solar eclipse, this newspaper will also hold the "28 Xi 'an Total Solar Eclipse" photo contest in conjunction with the National Time Service Center.

The recommended telephone number for the best observation point of total solar eclipse in Xi 'an is 29-8842971 (9: 3-11: 3 this morning), and the time and method of participating in the "28 Total Solar Eclipse in Xi 'an" photo contest held after the total solar eclipse will be informed by our newspaper recently.

Explanation of terms

Total solar eclipse, annular solar eclipse and partial solar eclipse: The moon revolves around the earth and passes through the direction of the sun once a month, which is called Shuori, which is the first day in the China calendar. If it happens to block the sun when passing by, there will be a solar eclipse. Because the distance between the sun and the earth and the moon and the earth changes slightly, the shadow cast by the moon on the earth is slightly longer, and the resulting solar eclipses are also divided into total solar eclipse, annular solar eclipse and partial solar eclipse. A partial solar eclipse means that the shadow of the moon partially covers the light of the sun, and the sun, the earth and the moon are not completely in a straight line; Annular eclipse means that when the sun, the earth and the moon are in a straight line, the moon is far away from the earth and cannot completely cover the sun, exposing a halo outside the sun; A total solar eclipse means that the shadow of the moon completely covers the sun, and the sun, the earth and the moon are in a straight line.

total eclipse zone: the area where total solar eclipse and total lunar eclipse can be seen.

initial loss: the partial solar eclipse begins.

eclipse: the total solar eclipse begins.

eclipse: the central moment of the solar eclipse (the closest time from the center of the moon to the center of the sun).

luminescence: the total solar eclipse is over.

last contact: The partial solar eclipse is over.

It is best to observe the total solar eclipse with X-rays

Facing the upcoming total solar eclipse on August 1st, most citizens certainly don't want to miss this astronomical spectacle that has not happened in more than 3 years. However, there are some matters needing attention on the day of watching.

According to Liu Ciyuan, National Time Service Center of Chinese Academy of Sciences, although you can directly look at the sun in a few seconds when there is a total eclipse, you need dimming tablets in other processes. The light protection effect of ordinary sunglasses is definitely not good. The observation mirror must be very dark. The most convenient thing is the X-ray film of the hospital. The public can make their own observation mirror by using the X-ray film. In addition to X-rays, the plastic film in the 3-inch floppy disk can also be made into an observation mirror. Binoculars can also be observed, but you must properly install the dimmer! Or you'll burn your eyes. If there are no X-rays, 3-inch floppy disks and binoculars at home, citizens can use candles to blacken the glass and watch the total solar eclipse.

There are quite a few things to see about the total solar eclipse

Eclipses often occur and are easy to observe, but the total solar eclipse is the real spectacle. When the total solar eclipse occurs, the shadow of the moon is getting bigger and bigger, and the sun is only hooked like a moth's eyebrow. At the same time, the sky darkens rapidly, the temperature drops obviously, the evil wind rises, and birds and animals run away. Subsequently, the "moth eyebrow day" became thinner and thinner, and finally disappeared completely. At the last moment, a string of bright particles appeared on the edge of the "black sun", called "Bailey beads". The sudden arrival of darkness seems like the middle of the night, the stars appear brightly, and there is still a glow in the distant horizon, and a corona that is usually invisible around the moon shadow. The total solar eclipse can only last for a few minutes at most. When the shadow of the moon gradually recedes from the sun, the sky will turn bright quickly, and people seem to come out of their dreams.

Pay attention to the stars appearing in the sky during the total solar eclipse (in this total solar eclipse, you can see Mercury-Venus-Saturn-Mars in a row at the upper left of the sun, while Jupiter faces each other in the southeast horizon). During the solar eclipse, the shadow spots of leaves falling on the ground and walls changed from round to crescent. If you are on a mountain or a tall building, you can also see the shadow of the moon sweeping across the earth.

If the total solar eclipse catches up with cloudy days, don't be too depressed. It is also very interesting to carefully taste the phenomenon that the sky turns from bright to dark, then bright and then dark.

There will be no total solar eclipse in our province next year

Dou Zhong, deputy director of the National Time Service Center of the Chinese Academy of Sciences, said that there will be another total solar eclipse on July 22 next year, and the total solar eclipse belt will cross the Yangtze River valley in China, which can be seen in cities such as Chongqing, Wuhan and Shanghai, and the total solar eclipse can be seen for about 5 minutes at the center line of the total solar eclipse belt, which is longer than this year's total solar eclipse. However, next year's total solar eclipse will not be seen in our province.

from 29 to 212, six solar eclipses can be seen in China, including an annular eclipse on January 26th, 29, and a partial solar eclipse can be seen in some parts of southern China. July 22, 29 was a total solar eclipse, and the total solar eclipse belt crossed the Yangtze River basin. January 15, 21 is an annular solar eclipse, which can be seen in Yunnan, Sichuan, Hubei, Anhui and Shandong. January 4 and June 2, 211 were partial eclipses, which can be seen in most parts of China; May 21st, 212 is an annular solar eclipse, which can be seen in Guangxi, Guangdong, Jiangxi, Fujian and Taiwan Province.

All the manuscripts in this group were written by our reporter Zhang Li Zhang Bo.