Across
- 3. the second man on the moon
- 4. the first man made satellite in space
- 5. the result of zero gravity
- 7. the type of star the sun is
- 9. one of the main gases burnt on the sun
- 11. the reason we don't feel the Earth spin
- 13. the shape of the Earth
- 14. the number of days a year on Mercury is
Down
- 1. the different appearances of the moon
- 2. the theory that people did not go to the moon
- 6. the moon is the Earth's ....
- 8. how scientists believe it all began
- 10. the other of the main gases burnt on the sun
- 12. the number of years it would take to get to Neptune