请详细描述太阳系八大行星的特点，内容必须包括每颗行星的自转方向、公转周期、体积大小和表面特性。请使用json格式输出，必须包含以下字段："Planet", "Rotation_Direction", "Orbital_Period", "Volume", "Surface_Characteristics"。
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{
  "Planets": [
    {
      "Planet": "Mercury",
      "Rotation_Direction": "Prograde",
      "Orbital_Period": "88 days",
      "Volume": "6.1x10^10 km³",
      "Surface_Characteristics": "Covered in craters, rocky terrain, and extensive plains"
    },
    {
      "Planet": "Venus",
      "Rotation_Direction": "Retrograde",
      "Orbital_Period": "225 days",
      "Volume": "9.3x10^11 km³",
      "Surface_Characteristics": "Extensive volcanic plains, large shield volcanoes, and impact craters"
    },
    {
      "Planet": "Earth",
      "Rotation_Direction": "Prograde",
      "Orbital_Period": "365.25 days",
      "Volume": "1.1x10^12 km³",
      "Surface_Characteristics": "Diverse, including oceans, continents, mountains, and valleys"
    },
    {
      "Planet": "Mars",
      "Rotation_Direction": "Prograde",
      "Orbital_Period": "687 days",
      "Volume": "1.6x10^11 km³",
      "Surface_Characteristics": "Vast plains, canyons (such as Valles Marineris), volcanoes, and polar ice caps"
    },
    {
      "Planet": "Jupiter",
      "Rotation_Direction": "Prograde",
      "Orbital_Period": "11.9 years",
      "Volume": "1.4x10^15 km³",
      "Surface_Characteristics": "Predominantly gaseous with cloud bands and the Great Red Spot (a giant storm)"
    },
    {
      "Planet": "Saturn",
      "Rotation_Direction": "Prograde",
      "Orbital_Period": "29.5 years",
      "Volume": "8.3x10^14 km³",
      "Surface_Characteristics": "Predominantly gaseous with prominent ring system and cloud bands"
    },
    {
      "Planet": "Uranus",
      "Rotation_Direction": "Retrograde (tilted on its side)",
      "Orbital_Period": "84 years",
      "Volume": "6.8x10^13 km³",
      "Surface_Characteristics": "Predominantly gaseous with cloud bands and faint rings"
    },
    {
      "Planet": "Neptune",
      "Rotation_Direction": "Prograde",
      "Orbital_Period": "164.8 years",
      "Volume": "6.3x10^13 km³",
      "Surface_Characteristics": "Predominantly gaseous with cloud bands and large dark spots (storms)"
    }
  ]
}
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