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7. When I was a kid, I wanted to grow up and be an__________________ and travel in space.

4. Our __________________ has eight planets

15. Perhaps, humans will travel in __________________s to other solar systems and planets in the future

14. Another word for planet is “__________________”.

5. I don’t live on the moon. I live on ________________.

10. Astronomers have discovered hundreds of other__________________s that orbit other suns.

2. Some people believe that there might be alien life on __________________.

8. The __________________ from the Earth to the sun is about 150 kilometers

6. __________________ makes things fall down.

12. Why do people want to __________________ space? Why do they want to find out what is out there?

1.Animals or plants that might live on other planets are called __________________.

11. The planet Neptune was _______________ed in 1846. People didn’t know it existed before that time.

9. Galileo Galilei was a famous _________________ who used a telescope to study the night sky 400 years ago.

3. Last year, I got a __________________ as a birthday present. Now I look at the stars every night.

world

solar system

astronaut

alien life

Earth

Mars

distance

spaceships

discover

explore

astronomer

telescope

gravity

planets