Space!

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Across
  1. 2. The closest planet to the sun.
  2. 3. The planet on which humans live.
  3. 4. An icy red planet in our solar system.
  4. 6. Still a planet.
  5. 8. 8th planet from the sun.
  6. 10. The source of light in our solar systm
Down
  1. 1. The largest planet in our solar system.
  2. 5. Yellow planet with rings of ice.
  3. 7. Earth's twin sister.
  4. 9. 7th planet from the sun.