Milky Way vocabulary

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