Across
- 3. Coastal ecosystem of salt-tolerant trees.
- 5. Brilliant flash of light during a storm.
- 8. Light bending as it passes through water.
- 10. Island and Light – Hard Crossword Clues (30)
- 13. Scientific term for the study and measurement of light.
- 15. A beam of light projected from a lighthouse.
- 16. The largest type of coral reef system, often protecting tropical islands. (11)
- 17. Brightness remaining in the sky after sunset.
- 18. Luminous atmospheric display near Earth's poles.
- 19. Natural illumination from celestial bodies.
Down
- 1. Bright celestial object visible at dawn or dusk.
- 2. Light emitted and reflected from the moon.
- 4. The daily disappearance of the sun below the horizon.
- 6. Faint glowing ring around the sun or moon.
- 7. Sheltered body of water surrounded by reefs.
- 9. Reflection of sunlight on waves creating sparkling effects.
- 11. Tropical tree whose fruit contains water and flesh.
- 12. The line where the sea appears to meet the sky.
- 14. The brightest star in the night sky.