At Night

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Across
  1. 3. police car and ambulance lights do this
  2. 6. to see for a long time
  3. 8. the sun ______
  4. 11. having no light
  5. 12. when it is dark outside
  6. 13. how a bat 'sees'
Down
  1. 1. the big circle you can see at night
  2. 2. having no empty space
  3. 4. where stars and planets are
  4. 5. star pattern
  5. 7. this makes light bounce
  6. 9. the sun is a ____
  7. 10. the big blue thing high up above you