The solar system

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Across
  1. 2. Natural satellite that reflects the Sun's light.
  2. 4. The time it takes for Earth to orbit the Sun.
  3. 5. The light source in our solar system.
  4. 6. The largest planet in the solar system.
Down
  1. 1. The time it takes for the Moon to orbit Earth.
  2. 2. The fourth planet, often called the Red Planet.
  3. 3. The planet closest to the Sun.