Earth
Explanation
The planets of the solar system are classified based on their physical characteristics and size. The four outer planets (Jovian planets) are significantly larger than the four inner planets (Terrestrial planets).
Analysis of Planetary Sizes:
The arrangement of planets in descending order of their size (diameter) is as follows:
- Jupiter: Largest planet.
- Saturn: Second largest.
- Uranus: Third largest.
- Neptune: Fourth largest.
- Earth: Fifth largest planet and the largest among the terrestrial planets.
- Venus: Sixth largest (often called Earth's twin due to similar size).
- Mars: Seventh largest.
- Mercury: Smallest planet.
Based on this classification, Earth occupies the fifth position in terms of size.
Key Takeaway:
Earth is the fifth largest planet in the solar system, ranking after the four gas giants (Jupiter, Saturn, Uranus, and Neptune).