Across
- 1. - Space telescope.
- 3. - The Red Planet.
- 5. - Dwarf planet.
- 8. - Neptune's moon.
- 10. - Hottest planet.
- 12. - Rotating neutron star.
- 13. - Bright and distant.
- 14. - Orbits a star.
- 17. - Minor planet.
- 19. - Our star.
- 20. - Polar lights
- 22. - Earth's natural satellite.
- 23. - Space rock.
Down
- 2. - Gravitational pull.
- 4. - Glowing ball of gas.
- 6. - Volcanic moon.
- 7. - Largest planet.
- 9. - Interstellar cloud.
- 11. - Ringed planet.
- 15. - Shadow event.
- 16. - Collection of stars.
- 17. - Nearest galaxy.
- 18. - Hunter constellation.
- 21. - Ice and dust.