Across
- 5. a powerful and bright stellar explosion
- 7. a star's brightness
- 8. a scientist in the field of astronomy
- 9. the fuel of a main sequence
Down
- 1. a cloud of dust and gas
- 2. a hot ball of glowing gases
- 3. a very large, bright star
- 4. a group of stars
- 5. a medium-sized star
- 6. a picture that helps you understand the written description