Space Crossword

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Across
  1. 7. Vehicles which move across a planet's surface
  2. 8. Objects that revolve around a planet
  3. 9. Group of stars
Down
  1. 1. Dense body preventing light from escaping
  2. 2. When a planet moves into the shadow of another planet
  3. 3. Rocks which orbit the Sun
  4. 4. Stars which spin extremely fast
  5. 5. Remains of stars after they explode
  6. 6. Clouds of gas and dust in space