10. Astronomers have discovered hundreds of other__________________s that orbit other suns.
9. Galileo Galilei was a famous _________________ who used a telescope to study the night sky 400 years ago.
8. The __________________ from the Earth to the sun is about 150 kilometers
11. The planet Neptune was _______________ed in 1846. People didn’t know it existed before that time.
3. Last year, I got a __________________ as a birthday present. Now I look at the stars every night.
12. Why do people want to __________________ space? Why do they want to find out what is out there?
14. Another word for planet is “__________________”.
6. __________________ makes things fall down.
7. When I was a kid, I wanted to grow up and be an__________________ and travel in space.
5. I don’t live on the moon. I live on ________________.
4. Our __________________ has eight planets
15. Perhaps, humans will travel in __________________s to other solar systems and planets in the future
1.Animals or plants that might live on other planets are called __________________.
2. Some people believe that there might be alien life on __________________.
alien life
Earth
solar system
world
planets
astronomer
Mars
astronaut
explore
telescope
gravity
spaceships
discover
distance