国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

National

Regional

Taiwan, HK, Macao

Special Coverage

Focus

Society

Profiles

Total solar eclipse to come, longest in 500 years

(Xinhua)
Updated: 2009-06-14 11:04

NANJING -- China will see the longest total solar eclipse in 500 years on July 22, a scientist said Saturday.

The prime time of the total eclipse was expected to begin from 9 a.m. to 9:38 a.m. (Beijing Time), said Wang Sichao, a research fellow with the Nanjing-based Purple Mountain Observatory under the Chinese Academy of Sciences.

Photo taken at 7:15 pm (1115 GMT) on Aug. 1, 2008 shows the total solar eclipse at an observation station in Jinta County of Jiuquan City, northwest China's Gansu Province.  [Xinhua]

"The total eclipse will last up to six minutes, or the longest one that can be seen in China in almost 500 years from 1814 to 2309," Wang said.

Related readings:  Total solar eclipse to visit China on July 22  Annular solar eclipse seen in Southeast Asia   Partial lunar eclipse seen in Cairo  Thousands witness total solar eclipse  Eclipse tourists overwhelm west China county

He said viewers in parts of 11 provinces in China's southwestern, central-southern and eastern areas, such as Tibet, Hunan and Jiangsu, will be able to witness the total solar eclipse, while in most parts of Shanghai, viewers can see the spectacular phenomenon.

For viewers in other provinces, including Beijing, they can observe a partial eclipse, he said.

A solar eclipse occurs when the moon is caught between the sun and the earth while each of them moves along their fixed orbits.

In a total solar eclipse, the sun, the moon and the earth are directly aligned as the sun swings into the cone of shadow cast by the moon.

Wang said the next total solar eclipse that can be seen in China will fall on March 20, 2034.

"But it can only be seen remote provinces, such as Tibet and Qinghai. It cannot not be compared with the upcoming one, in terms of duration and number of cities that can see the eclipse," he added.

The last total solar eclipse visible in China took place on August 1 last year. It was observed in northwest China and lasted two minutes in Yiwu County of northwestern Xinjiang Uygur Autonomous Region, the best place to see the phenomenon.