Astronomy, by Tsering Wangmo

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Across
  1. 5. Where stars spend 90% of their lives
  2. 9. Galaxies that have spiral arms
  3. 10. Determines a stars life cycle and lifespan
  4. 12. Galaxies that have an oval shape
  5. 14. End of fusion and star collapses due to gravity with an explosion
Down
  1. 1. Cloud of gas and dust
  2. 2. Core of an old dying star
  3. 3. At the center of most big galaxies
  4. 4. Things in the sky scientific name
  5. 6. Distance light travels in a year
  6. 7. Galaxies that have an irregular shape
  7. 8. The star's prototype before actually being formed
  8. 10. Size scientific term
  9. 11. Stage when stars run out of hydrogen
  10. 13. Cluster of stars