What do you know about space?

The knowledge about space is as follows:

Space (English: Space) refers to the cosmic space beyond the earth’s atmosphere and the entire space outside the atmospheric space. Physicists divide the atmosphere into five layers: the troposphere (from sea level to 9 kilometers), the stratosphere (9 to 45 kilometers), the mesosphere (45 to 80 kilometers), and the thermosphere (ionized layer, 80 to 400 kilometers). kilometers) and the outer atmosphere (ionosphere, above 400 kilometers).

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 aircraft to rely on air support for flight.

The cosmic space beyond the earth’s atmosphere, the entire space beyond the atmospheric space. Physicists divide the atmosphere into five layers: the troposphere (from sea level to 10 kilometers), the stratosphere (10 to 40 kilometers), the mesosphere (40 to 80 kilometers), and the thermosphere (ionized layer, 80 to 370 kilometers). kilometers) and the outer atmosphere (ionosphere, above 370 kilometers).

The detailed introduction of space knowledge is as follows:

Traveling to space provides people with an unprecedented experience. The most novel and exciting thing is that you can enjoy the beautiful scenery of space, and at the same time You can also enjoy the weightless taste. These two experiences can only be enjoyed in space. It can be said that this scene can only be found in the sky. The space tourism project started on April 30, 2001.

Since entering the universe in the 1950s, humans have launched more than 4,000 space launch vehicles. According to incomplete statistics, there are more than 9,000 debris in space with a diameter larger than 10 centimeters, hundreds of thousands of debris larger than 1.2 centimeters, and tiny particles such as paint flakes and solid propellant dust particles may number in the millions.