Unit 2; Journey into space (7)

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Across
  1. 2. to create a building
  2. 4. unlimited area, the home of planets, stars, satellites...
  3. 7. to say yes
  4. 8. you can see it in the sky at night, the Earth's natural satellite
  5. 9. essential, crucial or necessary
  6. 10. a form of energy
Down
  1. 1. opposite of cheap
  2. 3. opposite of dark
  3. 4. the largest star
  4. 5. We breathe it.
  5. 6. past, present and ........