Across
- 3. second planet from the sun
- 7. The farthest planet from the sun
- 9. anything that takes up space
- 10. Can help see objects close up in space
- 13. protects earth from radiation ( a layer )
- 14. mostly rocky planets
- 15. allows humans to survive in space ( 2 words )
- 18. A medium hot star
- 19. a gas planet, 5th planet from the sun
Down
- 1. orbits a planet
- 2. a thin layer of gold, helps filter out harmful radiation
- 4. Life can live on this planet
- 5. mostly gassy planets
- 6. closest planet to the sun
- 8. circles around the sun
- 11. holds together the solar system
- 12. icy and rocky
- 16. makes a solar system ( there's 8 )
- 17. 6th planet from the sun
- 20. what astronauts go in to visit space