Formation of the Solar System

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Across
  1. 3. A cloud of gas and dust in space
  2. 6. To watch carefully and notice,
  3. 8. To provide help, or evidence for something
  4. 9. Turn around and around
  5. 11. The giant planet of our solar system
Down
  1. 1. To say or show the opposite of something
  2. 2. The path a planet follows around the Sun,
  3. 4. An imaginary line a planet turns around
  4. 5. The smallest planet in our solar
  5. 7. The third planet from the Sun
  6. 10. The star at the center of the solar system