Across
- 2. stars that have burned up all of the hydrogen they once used as nuclear fuel.
- 3. large explosion that takes place at the end of a star's life cycle
- 6. an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars.
- 8. the smallest and coolest kind of star on the main sequence.
Down
- 1. a continuous and distinctive band of stars that appears on plots of stellar color versus brightness
- 4. a contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun.
- 5. hottest stars
- 7. dwarf a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently to no longer emit significant heat or light.
- 9. coolest stars