Across
- 5. The first stage of a star's life, and when matter coalesces into a dense region in its core.
- 7. Nothing can escape from this star, including light.
- 9. When a star is fusing hydrogen to helium in its core.
- 10. A star that has run out of fuel.
Down
- 1. The stage of a star's life that is a huge explosion.
- 2. Made of material left over from supernovas.
- 3. A cloud of gas and dust.
- 4. A white dwarf that has stopped glowing and emits no heat or light.
- 6. When a star runs out of hydrogen, expands, and gets hotter.
- 8. Stars with great intrinsic luminosity.
