Across
- 2. how the earth and the other planets move around the sun
- 3. A branch of Science
- 6. system of billions of stars
- 8. ball of ice in space
- 9. nighttime
- 10. spiral, electrical, irregular
- 12. planet pluto
- 13. imaginary line that earth rotates on
- 14. after visible light we can't see this
- 15. orbits around the sun
- 16. used to see far away objects in space
- 19. past Neptune
- 21. matter and space as a whole
Down
- 1. 8 planets, sun, stars, comets, etc.
- 4. the sun
- 5. gather information in space
- 7. the calendar used in most of the world
- 11. located between Jupiter and Mars
- 17. surrounds the sun
- 18. the distance light travels in a year
- 20. a type of Matter