Solar System

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Across
  1. 4. The planet known as the 'Red Planet.'
  2. 5. The planet closest to the Sun.
  3. 7. The largest planet in our solar system.
Down
  1. 1. The force that keeps planets in orbit.
  2. 2. The planet with the most extensive ring system.
  3. 3. The star at the center of our solar system.
  4. 6. The only planet known to support life.