请给我描述一下太阳系的行星，要求以JSON格式输出，并按距离太阳的远近排序。
user
```json
{
  "planets": [
    {"name": "Mercury", "distanceFromSun": "0.4 AU"},
    {"name": "Venus", "distanceFromSun": "0.7 AU"},
    {"name": "Earth", "distanceFromSun": "1 AU"},
    {"name": "Mars", "distanceFromSun": "1.5 AU"},
    {"name": "Jupiter", "distanceFromSun": "5.2 AU"},
    {"name": "Saturn", "distanceFromSun": "9.5 AU"},
    {"name": "Uranus", "distanceFromSun": "19.2 AU"},
    {"name": "Neptune", "distanceFromSun": "30.1 AU"}
  ]
}
```
assistant