*Complete the sentences with the words from the box.
| spacecraft | galaxies | rockets | maintenance | parabolic flight |
| space tourism | altitudes | telescope | missions | weightlessness |
1. The feeling of ……………………in space is surreal.
2. It becomes harder to breathe in very high …………………….
3. It takes a lot of ……………………to keep this rocket in great condition.
4. There are 8 planets in our galaxy but many more in other…………………….
5. ……………………are responsible for many discoveries in scientific history.
6. When an airplane is in ……………………, passengers can feel weightless.
7. It is believed that ……………………will become popular in the next 50 years.
8. NASA has had many failed ……………………but they are hopeful that this mission will succeed.
9. The International Space Station has developed many new ……………………in the last 10 years.
10. My little brother wants to work for NASA when he grows up so he can help build …………………….
