Across
- 1. Form at the end of some stars' lives
- 4. A ring planet
- 7. Can be bright and can be dim
- 8. Profession
- 10. Dwarf planet
- 11. Our solar system belongs to
- 13. To move around a line
- 15. An observatory
- 16. Astronomical event - temporarily
- 17. Not visible to the naked eye
- 18. Ninth largest celestial body
- 19. Small icy dirt balls
Down
- 2. A group of visible star
- 3. The study of everything in the universe
- 5. Between the inner and outer planets
- 6. Natural satellite
- 9. A strange creature
- 12. A force
- 14. To magnify the image of celestial body
- 20. Above us