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We live on a planet called Earth that is part of our solar system. But where is our solar system? It’s a small part of the Milky Way Galaxy.
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle.
The audience is curious about how Yang Liwei became the first Chinese astronaut.
Mr. Yang always believed that he would become an astronaut one day.
Mr. Yang was selected to attend pilot training with 13 other people.
To become an astronaut in China, you have to have 1350 hour of flying experience.
Astronauts not only had to learn how to use space equipment, but also had to do a lot of mental and physical training.
A: You know, I think being an astronaut would be cool.
B: Do you want to work in space in the future?
A: I’m not sure, but I think it might be too difficult for me. There are so many requirements. First of all, you must be intelligent enough to get a related college degree. Then you have to …
B: So, what might be the most difficult part for you?
A: I guess it might be the …
