Galaxy crossword

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Across
  1. 2. star, after a supernova a small object with a small radius is formed with very high density
  2. 5. a galaxy with a spiral shape with contains young stars
  3. 9. where stars are born
  4. 10. when a low mass star expands and dies
  5. 12. a galaxy with a spiral shape only containining old stars
  6. 13. a galaxy with an oval shape with mostly old stars
  7. 15. dwarf, the ending of the low mass star life cycle
  8. 16. what happens after a supernova with a strong gravitational pull even pulling in light
  9. 17. fusion, With a spinning pattern when dust and gas are fused together producing a star
  10. 18. a star with a more compact structure but dies slower
Down
  1. 1. when a red giant dies and explodes
  2. 3. when a high mass star expands and dies
  3. 4. where millions or billions of stars are born with gas and dust
  4. 6. galaxy, a galaxy with no specific shape with contains old and young stars
  5. 7. the theory of what will happen after the white dwarf star
  6. 8. a star that's bigger and dies out quicker
  7. 11. When a red giant dies and collapses
  8. 14. our closest star in the center of the solar system