轨道半径即行星离太阳的平均距离。行星..........轨道半径(km).......切线速度 水星..........57,910,000.........47.874km/s 金星.........108,200,000.........35.024km/s 地球.........149,600,000.........29.786km/s 火星.........227,940,000.........24.131km/s 木星.........778,330,000.........13.059km/s 土星.......1,426,940,000......... 9.644km/s 天王...
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