What is SPACE?

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Across
  1. 4. In Space, no one can hear you ________________
  2. 5. Space is defined as a _____________
  3. 7. vast gaps between the stars and planets are filled with huge amounts of thinly spread gas and ________.
  4. 8. _____________ and ultraviolet radiation comes from the Sun
  5. 9. Even though we call it "Space," it is not completely _____________
  6. 10. High _________ X-Rays, Gamma Rays, and Cosmic Rays come from distant star systems
Down
  1. 1. ______________ waves cannot travel through Space
  2. 2. Space is not the color blue because there is no air to ___________ light
  3. 3. Space is also filled with many forms of _______________that are dangerous to astronauts
  4. 6. _________ space begins where the shell of air disappears