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