The space Crossword

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Across
  1. 4. _ is the closest planet to the sun
  2. 6. There is eight _
  3. 7. The _ is the hottest planet
  4. 9. _ Armstrong was the first man on the moon
  5. 10. _ is the only planet with oxygen
  6. 11. _ is a dwarf planet
Down
  1. 1. The sun is a _
  2. 2. Earth is the fifth largest planet in the _ system
  3. 3. _ is the coldest planet
  4. 5. there is no oxygen in _
  5. 8. Many planets _ around the sun