Across
- 2. planets
- 3. colourful thing in the sky after it rains
- 4. year/is the distance that light can travel in one year in a vacuum
- 5. planet to the sun
- 9. in the night sky
- 11. rock flying through space
- 13. Belt/distant objects than circle the Sun
- 14. is a physical force that pulls objects together
- 15. giants/They are the large outer planets of our Solar System
- 17. we live
- 19. system with stars and dust
- 20. a half of the celestial sphere divided into two halves by the horizon
Down
- 1. absence of gravity; a condition of weightlessness
- 6. biggest planet
- 7. smallest planet
- 8. a star dies it appears
- 10. object, volume
- 12. object that supplies heat
- 16. is an element with the atomic number 2.
- 18. line at which the sky and Earth appear to meet