Across
- 3. a huge cloud of gas and dust
- 5. the second stage of a star
- 6. it's made when a white dwarf gets too cold
- 8. a less mass that creats luminosity
- 10. Something formed when a massive star runs out of fuel
- 13. a region of cosmic gas and dust formed from the cast-off outer layers of a dying star.
Down
- 1. a huge explosion of gas
- 2. the core of a star that slowly cools
- 4. a huge mass that creates luminosity
- 7. collapses
- 9. the biggest a star gets
- 11. an expanded version of a star
- 12. hole a region of space having a gravitational field so intense that no matter or radiation can escape.