Across
- 2. - Eighth planet from the sun (7 letters)
- 3. - Massive system of stars (6 letters)
- 5. - Bright celestial object (6 letters)
- 6. - Eight-armed sea creature (7 letters)
- 8. - Explosive displays (9 letters)
- 13. - Sweet treat (9 letters)
- 14. - Festive celebration (8 letters)
- 15. - Space explorer (9 letters)
- 17. - Precious gemstone (7 letters)
- 18. - Electric discharge during a storm (10 letters)
- 19. - Large mammal with tusks (8 letters)
Down
- 1. - Illumination from Earth's satellite (9 letters)
- 4. - Largest planet in our solar system (7 letters)
- 7. - Device for slowing descent (9 letters)
- 9. - Marsupial native to Australia (8 letters)
- 10. - Massive floating block of ice (7 letters)
- 11. - Photography device (6 letters)
- 12. - Long-distance running race (8 letters)
- 16. - Bright yellow flower (10 letters)
- 20. - Pollinating insect (8 letters)