planets by Don

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Across
  1. 3. is the eighth and farthest-known Solar planet from the Sun. I
  2. 4. is the fourth planet from the Sun and the second-smallest planet in the Solar System
  3. 7. is the seventh planet from the Sun.
  4. 8. is the fifth planet from the Sun and the largest in the Solar System.
Down
  1. 1. is the smallest planet in the Solar System and the closest to the Sun.
  2. 2. is the second planet from the Sun.
  3. 5. is the sixth planet from the Sun and the second-largest in the Solar System
  4. 6. is the only astronomical object known to harbor life.