The three people in space are Zhai Zhigang, Wang Yaping and Ye Guangfu. According to the China Manned Space Engineering Office, at 2 1, 10, 15, 2 1: 40 Beijing time, the astronauts of Shenzhou XIII manned mission asked Tiange Square to leave the cabin in groups at Jiuquan Satellite Launch Center. At 2/kloc-0: 42, Li, the commander-in-chief of China's manned spaceflight project and the space station's phase mission command, gave an order, and three astronauts, Zhai Zhigang, Wang Yaping and Ye Guangfu, were ordered to go out. The six-month mission is about to begin.

Space description

Space English space, Chinese dictionary explanation is extremely high sky. The International Aviation Federation in Geneva, Switzerland, defined the boundary between the atmosphere and space, with a height of about 62 miles from the earth's sea level 100 km as the boundary, which is called Carmen Line. Carmen Line is named after American scientist Theodore von Kármán.

Geophysicists divide atmospheric space or air space into five layers. Troposphere, sea level to 10 km. There is dense air in the troposphere, which is called dense atmosphere. The dense atmosphere becomes thinner and thinner with the increase of height. Stratosphere,10-40km. Intermediate layer, 40~80 kilometers.

80-370 km is the thermosphere, which belongs to the lower part of the ionosphere. The outer atmosphere, more than 370 kilometers of space, belongs to the upper part of the ionosphere. From the surface of the earth to the height of 100 km, with the increase of height, there is less and less air. About 75% of the atmosphere above the earth exists in the troposphere and 97% is below the stratosphere.

The air density in the thermosphere is 65,438+0% of the earth's surface. At the height of outer space 16000km, air particles still exist, even at the height of 65438+ 100000km. Therefore, there is no clear boundary between airspace and outer space.