Solar System

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Across
  1. 3. An icy small Solar System body.
  2. 5. The first planet found by mathematical prediction rather than by empirical observation.
  3. 6. The smallest and closest to the Sun.
  4. 8. Where we live ?
  5. 9. This planet composed primarily of rock and ice and is relatively small.
Down
  1. 1. The second largest planet in the Solar System.
  2. 2. The largest planet in the Solar System.
  3. 4. The second smallest planet in the Solar System.
  4. 7. This planet is similar in composition to Neptune.