Across
- 2. first month of summer
- 3. not a human who live in space
- 6. the closest planet to Sun
- 8. system system of the Sun and our planets
- 10. a person who travell in a space ship into space
- 12. one name for a collection of millions of stars
Down
- 1. the biggest planet
- 4. the hottest planet
- 5. the star which looks like it is falling down on the sky
- 7. the red planet
- 9. our closest star
- 11. surname of first man in space