Across
- 2. a proof that you have done something
- 3. many of them are flying around earth atmosphere
- 5. something new is explored and built by scientists
- 6. other word for universe
- 7. the moon ..... around the earth
- 9. a person who analyses and invents things
- 11. with this object we can fly to mars
Down
- 1. humanity is gaining more and more .....
- 4. our eight planets and the sun
- 8. a big yellow fire ball (star)
- 10. our home planet