The sun

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Across
  1. 5. Damages earth's magnetic field & technology
  2. 10. Forms the sun's outer atmosphere
  3. 11. The center of the sun
  4. 12. When two nuclei come together as a nucleus
  5. 14. When deuterium combines with a nucleus
  6. 15. The sun hides behind the moon during this
  7. 17. An arch on the edge of the sun
  8. 20. When two hydrogen nuclei collide
Down
  1. 1. A very dense region
  2. 2. when sunspots apper spike shape they are called
  3. 3. The region gas is circulated
  4. 4. rising and falling colums of hot gases
  5. 5. Fields that can come in contact with earth
  6. 6. A thin region below the corona
  7. 7. Region of high temp&brightness on surface
  8. 8. light colored area around the sunspot visible from earth
  9. 9. A dent in the corona of the sun
  10. 13. dark spots located on the suns photosphere
  11. 16. The visible part of the sun
  12. 18. When two helium-3 atoms combine
  13. 19. A medium size star in the middle aged stage