universe-liberty-1st period

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Across
  1. 4. lanes bands of dust
  2. 6. all space and the matter space contains
  3. 8. shift the change in wave length
  4. 9. between radio waves and infrared
  5. 10. of light 300,000km/sec
  6. 12. waves provide us with light
  7. 13. spectrum electromagnetic waves
  8. 15. large grouping of stars
  9. 17. large cloud of gas
  10. 18. data info from experiments
Down
  1. 1. electromagnetic waves
  2. 2. length distance between any two corresponding
  3. 3. year light travels through space 1 year
  4. 5. arms area of stars spread out from the center
  5. 7. radiation radiation consisting of electric
  6. 8. the transfer of energy through matter of space
  7. 11. hole an object with more than four solar masses
  8. 14. center rotational center of a huge galaxy
  9. 16. the death of a large star explosion