The content of the space handwritten newspaper is 30 words.

1. In fact, the first object to go into space was a V2 missile, and the first one to go into orbit was a Soviet satellite.

2. Do you think the last atmosphere was really only 120km? You are wrong. There are oxygen atoms as high as 6000 kilometers. In other words, most satellites now will slow down due to atmospheric drag and be towed back to the ground after many years.

3. The orbits of celestial bodies are all elliptical, so we have two names: near-arch point and far-supply point. As the name implies, the near arch point is the nearest point of the earth, while the far supply point is just the opposite. There are some strange phenomena, which involve inertia. Let's not talk about theory for a moment. When we run to the far supply point, the speed of the spacecraft will increase, but when we return to the near arch point, the speed will slow down.

4. How did the spacecraft change its orbit? The way they change their orbits is Homan transfer.

Homan transfer is a common way to transfer between two orbits with different heights. The orbit used in Hohmann transfer is an elliptical orbit, with perigee at a lower altitude and apogee at a higher altitude.

space technology

Artificial earth satellite. 1970 China successfully developed and launched the first artificial earth satellite "Dongfanghong-1" on April 24th, becoming the fifth country in the world to independently develop and launch artificial earth satellites. As of June 5, 2000, China * * * has developed and launched 47 different types of artificial earth satellites, with a success rate of over 90%. At present, China has initially formed four satellite series-recoverable remote sensing satellite series, "Dongfanghong" communication and broadcasting satellite series, "Fengyun" meteorological satellite series and "practical" scientific exploration and technical test satellite series, and "Resources" earth resources satellite series will soon be formed. China is the third country in the world to master satellite recycling technology, and the success rate of satellite recycling has reached the international advanced level; China is the fifth country in the world to independently develop and launch a geostationary orbit communication satellite. The main technical indexes of China Meteorological Satellite and Earth Resources Satellite have reached the international level in the early 1990s. In recent years, six communication, earth resources and meteorological satellites developed and launched by China have been put into use, with stable work and good performance, resulting in good social and economic benefits.

Launch vehicle. China has independently developed 12 Long March series launch vehicles of different models, which are suitable for launching near-earth orbit, geostationary orbit and sun-synchronous orbit. The maximum carrying capacity of the "Long March" series of launch vehicles in near-earth orbit reaches 9200 kg, and the maximum carrying capacity of geosynchronous transfer orbit reaches 5 100 kg, which can basically meet the needs of different users. Since 1985, the China government officially announced that the Long March series of launch vehicles had entered the international commercial launch market, 27 foreign-made satellites have been successfully launched into space, occupying a place in the international commercial satellite launch service market. Up to now, the "Long March" series of launch vehicles have been launched 63 times; From June 1996 to June 10, 2000, the "Long March" series of launch vehicles have been successfully launched for 2 consecutive times.