Space and the planets crossword

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Across
  1. 3. What planet do we live on?
  2. 4. What are the small things that sparkle in the sky?
  3. 5. What comes out in the sky at night?
Down
  1. 1. How many planets are there in our Solar System?
  2. 2. What planet is closest to the sun?
  3. 4. What do the planets orbit?