Differentiate between
Inner solar system and outer solar system

Explanation

To differentiate between the inner solar system and the outer solar system, we can break down the characteristics of each into several key points:

### Step-by-Step Solution:

1. **Definition of Inner Solar System**:
- The inner solar system consists of the first four planets: Mercury, Venus, Earth, and Mars.

2. **Characteristics of Inner Solar System**:
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