Across
- 2. zone layer of the sun
- 3. hole supergiant explodes
- 6. glowing sphere of gases
- 9. outermost layer of the sun
- 10. high energy
- 13. fusion merging together of nuclei atoms
- 14. tremendous explosion
- 15. zone electromagnetic waves
- 16. dwarf mid-sized star
- 18. cluster of stars
- 19. star massive star
Down
- 1. visible surface
- 4. thin layer of the sun's atmosphere
- 5. method used by astronomers
- 6. prominence sunspots
- 7. fusion reaction two nuclei fuse together
- 8. flare violent explosion
- 11. light
- 12. giant stage in a star's development
- 17. sequence star hydrogen atoms to helium