General knowledge puzzles

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Across
  1. 3. this planet is encircled by rings
  2. 6. the main substance in stars that burn
  3. 8. Furthest planet from the sun
  4. 9. collective noun for bees together
Down
  1. 1. cluster of stars together
  2. 2. another name for ants
  3. 3. Nearest star to the Earth
  4. 4. a complete void in space having nothing in it
  5. 5. Earth's natural satellite
  6. 7. the opposite of shy