Across
- 2. name of our galaxy
- 4. has a rings
- 8. the layer of gases surrounding a planet
- 10. surrounds the solar system
- 11. our home
- 12. the only one star
- 13. the most abundant element in the universe
- 14. grants the life to exist
- 15. planet closest to our mother-star
Down
- 1. where gravity pulls as much that even light cannot escape
- 3. our sister galaxy
- 5. called the red planet
- 6. force of attraction acting between all matter
- 7. protects the other planets against comets and asteroids
- 9. successfully landed on Mars this year