Across
- 4. prominence large,bright, loop shaped feature
- 5. extended atmosphere of a star
- 6. spot or patch appearing from time to time
- 8. zone layers in a stars interior
- 10. nuclear reaction which nuclei fuse
- 12. brief eruption of intense radiation
Down
- 1. primary nuclear fusion process
- 2. particle with a mass close to zero
- 3. visible, lowest layer of the suns atmosphere
- 7. microscopic needle-like structural elements
- 9. zone outermost layer of a stars interior
- 11. thin,reddish layer of the suns atmosphere