The Universe Christy Johnson

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Across
  1. 8. object which light cannot escape
  2. 9. electromagnetic waves
  3. 11. bulge in the center and very long "arms" winding around the center
  4. 13. all space and matter space contains
  5. 15. that does not fit in any category
  6. 17. electromagnetic waves that are very high energy
  7. 19. Earth and other planets orbit
  8. 20. electromagnetic waves that are very high energy and no mass or charge
  9. 21. provide us with visual light
Down
  1. 1. bands of dust that appear as dark ribbons
  2. 2. death of a star with explosion
  3. 3. large cloud of gas and dust
  4. 4. which we live
  5. 5. transfer of energy
  6. 6. electromagnetic waves that are between radio waves and infrared waves
  7. 7. rotational center of a huge galaxy such as the Milky Way
  8. 10. bright center and little dust and gas
  9. 12. large grouping of stars in space
  10. 14. distance between 2 corresponding points
  11. 15. waves with longer wavelengths
  12. 16. change in wavelength
  13. 18. held together by its own gravity