Solar system

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Across
  1. 3. There a ____ planets in our solar system
  2. 4. The star at the centre of our solar system is the ____?
  3. 5. The planet that we live on
  4. 7. The explosion of a star is called a ______?
  5. 8. The closest planet to the sun
Down
  1. 1. You can use this to look at far away objects
  2. 2. The largest planet is _____?
  3. 6. Is no longer considered a planet
  4. 9. One trip around the sun is called a ____?