Across
- 5. glowing sphere of gases
- 8. star'[s development
- 9. flowing between sunspots
- 12. group or clusters of stars
- 14. main portion of its life
- 15. fusion huge amounts of energy
- 16. violent explosion
- 19. directly above the photosphere
- 20. visible surface of the sun
Down
- 1. tremendous explosion
- 2. energy moves atom to atom
- 3. dwarf mid-sized star
- 4. method used by astronomers
- 6. removed from atoms
- 7. two atoms fuse together
- 10. surrounds the radiative zone
- 11. outermost layer
- 13. hole explodes as a supernova
- 17. particle of light
- 18. massive star