Across
- 3. dim small star
- 4. small rock body
- 5. system of stars, gas and dust
- 6. force of attraction
- 9. bowl shaped hole
- 10. block the sun or moon
- 13. study of celestial objects
- 14. frozen leftover of solar system
- 15. radioactive ray
- 16. star pattern
- 18. ordered universe
- 19. start of universe
Down
- 1. another word for outer space
- 2. small planet
- 3. 85% of universe
- 7. first quarter moon
- 8. intense gravity region
- 11. Russian astronaut
- 12. fully illuminated moon
- 16. layer of sun
- 17. black hole boundary