space stars

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Across
  1. 3. Is the birthing place of most stars.
  2. 5. biggest type of star.
  3. 6. if this doesn't exist, we would not exist.
  4. 7. biggest planet in our solar system.
Down
  1. 1. smallest planet ever in our solar system.
  2. 2. made of ice and dust
  3. 4. Is made of protons.