Across
- 2. A ultra-dense, collapsed core of a massive star
- 4. Cloud of gas and dust
- 5. Their lifetime is short and they cool down quickly
- 9. Cold dark and invisable
- 10. a star that is fusing hydrogen to helium in its core
Down
- 1. A star that suddenly increases greatly in brightness
- 3. The remnant of an average sized star
- 6. Earliest stage of a stars life
- 7. A region in space with so much gravity that nothing can escape
- 8. This star can reach sizes over 100 times