Space

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Across
  1. 4. 13.8 billion years old How old is space?
  2. 6. what is In space?
  3. 7. what color is space?
Down
  1. 1. is completely silent how loud is space?
  2. 2. What’s one mysterious thing floating around space?
  3. 3. mixed together how are stars made?
  4. 5. what planet is closest to the earth?
  5. 7. what color is space?