请提供一组关于太阳的详细信息，必须包括其年龄、质量、直径，以及其他三个独特且有趣的特征。所有信息必须包括可靠的来源，用标准格式的英文（行文中不使用缩写，如cannot， романи为cannot）。
 太阳的温度是多少？所有信息需格式化为json格式。
user
```json
{
  "Sun": {
    "Age": "Approximately 4.6 billion years",
    "Source_Age": "NASA",
    "Mass": "1.989 x 10^30 kilograms",
    "Source_Mass": "NASA",
    "Diameter": "1.39 million kilometers",
    "Source_Diameter": "Space.com",
    "Unique_Features": [
      {
        "Feature": "Solar Flares",
        "Description": "Sudden, intense variations in brightness appearing as massive flares",
        "Source": "National Oceanic and Atmospheric Administration"
      },
      {
        "Feature": "Sunspots",
        "Description": "Dark spots on the Sun caused by intense magnetic activity",
        "Source": "National Aeronautics and Space Administration"
      },
      {
        "Feature": "Helioseismology",
        "Description": "Study of the vibrations on the Sun's surface to understand its interior",
        "Source": "European Space Agency"
      }
    ],
    "Temperature": "The surface temperature of the Sun is about 5,500 degrees Celsius, while its core reaches up to 15 million degrees Celsius.",
    "Source_Temperature": "NASA"
  }
}
```
assistant