The boundless outer space is mysterious and beautiful, which always arouses our infinite reverie. I believe that every child has had an aerospace dream when he looks up at the starry sky in the silent night. How many people are there in space? What's life like in space? What other knowledge about "brain opening"? Dear friends and children, let's have a look!
Although it is impossible for astronauts to take off their spacesuits and take a breath in space, when they come back from the extravehicular space, they can smell the smell of the crew: because the cabin belongs to an aerobic environment, these strongly oxidizing oxygen atoms attached to clothes will oxidize the oxygen molecules inside into ozone, so they will smell a smell similar to "welding dust".
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1, space, the sky with high interpretation in Chinese dictionaries. The International Air Federation in Geneva, Switzerland defines the boundary between the atmosphere and space: the height from the earth's sea level 100 km (about 62 miles) is the boundary, which is called Carmen Line. Carmen Line is named after American scientist Theodore von Kármán.
2. 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.
3. The outer atmosphere, a space of more than 370 kilometers, 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.
4. The air density of the thermosphere is 1% of the earth's surface. At the height of outer space 16000km, air particles still exist, even at the height of 10000km. Therefore, there is no clear boundary between airspace and outer space.
The view was expressed that the applicable law should be determined according to the function of the spacecraft. If it is a spacecraft, its activities are space activities and the outer space law should be applied. If it is an aircraft, its activities belong to aviation activities and should be governed by aviation law; The whole space is a whole, and there is no need to divide air space and outer space.