Our Universe

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Across
  1. 2. A river falling from a height forms.
  2. 4. The red planet.
  3. 6. A big ball of fire.
Down
  1. 1. A low area of land lying between two hills or
  2. 3. The planet made up of land, water and air.
  3. 4. A heavenly body that does not have its own
  4. 5. The sun sets in the ______ direction.