Across
- 3. A star that is fusing hydrogen into helium
- 5. A new star that is formed when nuclear fusion takes place in the core of a nebula
- 7. The coolest stars
- 8. An old star that has started burning helium and is bigger than a giant
- 10. The layer between the photosphere and the corona
Down
- 1. An explosion that destroys a star
- 2. The hottest stars
- 4. The outermost layer of a Sun's atmosphere
- 6. A star that is cooling down and expanding
- 9. The apparent surface of a Sun's atmosphere