Across
- 3. the first of its kind
- 6. expensive
- 7. how big
- 8. element
- 11. home
- 13. boom remnants
- 14. north star or something
- 16. that science word
- 17. scary
- 18. pins you to the ground
- 21. speed of light and time
Down
- 1. ISs?
- 2. group of stars make image
- 4. the void
- 5. constellation and closest galaxy
- 8. telescope
- 9. research machines
- 10. galaxy
- 12. star system
- 15. WEEE FUN RIDE
- 18. big spinny thing
- 19. most aren't habitable
- 20. gassy