Solar System

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Across
  1. 3. is the smallest planet in the Solar System and the closest to the Sun. Its orbit around the Sun takes 87.97 Earth days, the shortest of all the Sun's planets.
  2. 6. is the third planet from the Sun and the only astronomical object known to harbor life.
  3. 7. is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
  4. 8. is the seventh planet from the Sun. Its name is a reference to the Greek god of the sky.
Down
  1. 1. is the eighth planet from the Sun and the farthest known solar planet. In the Solar System, it is the fourth-largest planet by diameter.
  2. 2. is the fourth planet from the Sun and the second-smallest planet in the Solar System.
  3. 4. is the second planet from the Sun and Earth's closest planetary neighbor.
  4. 5. is the star at the center of the Solar System, It is a nearly perfect ball of hot plasma.