Across
- 3. Old, metal‑poor stars found in the halo and bulge.
- 4. The spiral galaxy that contains our solar system.
- 9. Distance‑measuring technique using radio signals from red giant stars.
- 11. Idea that spiral arms are long‑lasting waves of crowded stars and gas.
- 14. Loose group of young stars found in the galactic disc.
- 15. Dust cloud that reflects the light of nearby stars.
Down
- 1. Tight, spherical group of very old stars in the halo.
- 2. Young, metal‑rich stars found in the disc.
- 5. First stars ever formed; extremely old and metal‑free.
- 6. Area of the sky blocked by Milky Way dust, hiding galaxies.
- 7. Thick cloud of dust that blocks light from behind it.
- 8. Dense, central ball of older stars in a galaxy.
- 10. Spherical region around a galaxy with old stars and globular clusters.
- 12. Glowing gas cloud lit by nearby hot stars.
- 13. Flat, rotating part of a galaxy containing gas, dust, and young stars.