Across
- 2. eclipse, event when Earth blocks sunlight from reaching the Moon
- 4. adjective meaning "relating to the Moon"
- 8. zone, solar layer where energy travels outward by radiation
- 10. dark area produced when an object blocks light
- 13. visible surface layer of the Sun
- 14. oval-shaped orbit followed by planets
- 15. fusion, process that powers the Sun by combining nuclei
- 16. spinning of a body on its axis
- 18. zone, solar layer where hot plasma rises and cool plasma sinks
- 19. bowl-shaped depression from an impact
- 20. particle of light
- 21. imaginary line an object spins around
- 23. eclipse, event when the Moon blocks sunlight from reaching Earth
- 24. Sun's outer atmosphere visible during total eclipses
- 25. Moon phase with a thin curved sliver illuminated
Down
- 1. partial outer shadow where light is partially blocked
- 3. prominence, large, bright loop of plasma extending from the Sun
- 5. darkest central part of a shadow where light is fully blocked
- 6. half of a sphere (e.g., Earth)
- 7. Moon phase more than half illuminated but not full
- 9. Sun layer above the photosphere, seen during eclipses
- 11. complete orbit of one body around another
- 12. flare, sudden, powerful release of energy from the Sun's surface
- 17. dark, basaltic plains on the Moon (Latin for "seas")
- 20. hot, ionized gas making up the Sun and stars
- 22. lighter, highland regions on the Moon (Latin for "lands")