Chapter 15 crossword answers

123456789101112131415
Across
  1. 4. large distance measurement
  2. 5. small arms appearing fluffy
  3. 8. produces spiral arms
  4. 9. arms winding outwards
  5. 10. an area of a galaxy with two others inside
  6. 11. to fully decribe the rotation of our galaxy
  7. 13. extended halo
  8. 14. the disk of a galxay
  9. 15. Kepler's laws
Down
  1. 1. invisible mass
  2. 2. flattened cloud of billions of stars
  3. 3. map for spiral arms
  4. 6. prepare equipment
  5. 7. spherical cloud of stars
  6. 12. a galaxy with two bold arms