Across
- 2. Last about a billion years
- 5. Gravitational pull is so strong, light cannot escape
- 8. The most massive and most luminous stars
- 9. Lasts for about 100 seconds
- 10. When a white dwarf gets too cold it becomes
Down
- 1. Where stars spend most of their lifetime
- 3. Where stars are formed, made of gas and dust
- 4. The collapsed core of a supergiant
- 6. Stars that have burned up all of their hydrodgen
- 7. A clump of gas and dust formed in a nebula