Across
- 3. Old stars with low metallicity found in halos and globular clusters
- 4. The galaxy that contains our solar system
- 9. A method using emissions from red giant stars to study space
- 11. A model explaining spiral arms as moving high-density regions
- 14. Groups of young stars formed together
- 15. Clouds that reflect nearby starlight
Down
- 1. Dense spherical groups of very old star
- 2. Young stars with high metallicity found in spiral arms
- 5. The first generation of stars with no heavy elements
- 6. The part of the sky blocked by the Milky Way’s dust, gas, and stars
- 7. Dense clouds that block light from objects behind them
- 8. A dense central concentration of stars in a galaxy
- 10. A large faint spherical region surrounding a galaxy
- 12. Interstellar clouds that glow and emit their own light
- 13. A flattened rotating structure made of gas, dust, and stars