Outer Space

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Across
  1. 2. Planet with biggest rings
  2. 4. Our galaxy
  3. 6. No. of (inner) planets
  4. 7. Twinkle Twinkle
  5. 8. The closest star that heats up our plant
Down
  1. 1. Big chunk of rock floating in space
  2. 3. Our planet
  3. 5. closest planet