Across
- 1. Universe as a whole.
- 5. - A massive system of stars.
- 6. - Largest land mammal.
- 12. - Swirling wind funnel.
- 13. - Celestial event.
- 16. Uncover something previously unknown.
- 19. Space debris entering the atmosphere.
- 21. - Art of capturing images.
- 22. Investigates new territories.
- 23. - Electrical discharge during a storm.
- 24. - Extremely cold region.
- 27. Warm climate zone.
- 28. - Travels in space.
- 29. - Interconnected natural environment.
- 32. - Erupts molten rock.
- 34. - Exceptional intelligence.
- 35. - Famous physicist.
- 36. Study of celestial bodies.
Down
- 2. - Orbits a planet.
- 3. - Houses books and knowledge.
- 4. - Changes color.
- 7. - Sound during a storm.
- 8. - Represents the Earth.
- 9. - Preserved remains of ancient life.
- 10. - Gaseous layer around Earth.
- 11. Scientific trial.
- 14. - Finding something new.
- 15. Mass of ice.
- 17. - Largest ocean.
- 18. - Study of the Earth's surface.
- 19. - Attracts metal.
- 20. - Studies human history through artifacts.
- 21. - Our solar system has eight of these.
- 25. Intense storm with strong winds.
- 26. - Creates new devices.
- 30. - Vast body of water.
- 31. Enlarge an image.
- 33. - Where the sky meets land or sea.