Galaxies

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Across
  1. 3. age of most stars in irregular galaxies
  2. 4. galaxy shaped like a lens or a lentil
  3. 8. rotating galaxy with arms
  4. 9. how the universe is getting bigger
  5. 11. the "fat" center of a galaxy
  6. 13. galaxy shaped like an egg
  7. 14. force that holds galaxies together
Down
  1. 1. all space, matter, time, and energy
  2. 2. systems of planets surrounding a star
  3. 5. galaxy with no definite shape
  4. 6. a huge ball of gas producing own energy
  5. 7. age of most stars in elliptical galaxies
  6. 10. a huge cloud of gas and dust
  7. 12. distance light travels in 1 year