1. Today, human beings went into space, but it was sad to see that all five continents were the same. -Mao Zedong's "Imitation of Lu Fangweng Four Musts"
2. Only clear the frost, no wind. -Yang Wanli's two "Crossing the Yangtze River"
3. Creation does not consider itself a success, but a return to space. -Su Shi's Xi Yu Ting Ji
Data expansion:
Space (English: Space) is extremely high according to the Chinese dictionary. 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.
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.
Related information:
The space outside the earth's atmosphere, the whole space outside the atmosphere. Physicists divide the atmosphere into five layers: troposphere (sea level to 10 km), stratosphere, mesosphere, thermosphere and outer atmosphere (ionosphere, above 370 km). About 3/4 of the atmosphere above the earth is in the troposphere, and 97% is below the stratosphere. The outer edge of the stratosphere is the highest limit for an aircraft to fly with air support.
Some high-altitude rockets can enter the middle layer. The lowest orbit of the satellite is in the thermocline, and its air density is 1% of the earth's surface. At the height of 16000km, air continues to exist, and even at the height of 10000km, there are still air particles. From a strictly scientific point of view, there is no clear boundary between airspace and outer space, but they are gradually integrated.
The Scientific and Technical Subcommittee of the United Nations Committee on the Peaceful Uses of Outer Space pointed out that it is impossible to put forward accurate and lasting scientific standards to divide the boundary between outer space and airspace at present. In recent years, it tends to take the minimum height of artificial satellites from the ground (100 ~1100 km) as the lowest limit of outer space.