太陽

名稱赤道半徑(km)質量(kg)自轉週期(days)密度(g/cm3)
太陽sun696,0001.9891e30赤道:25 兩極:351.41

九大行星

名稱軌道平均半徑
(000 km)
赤道半徑
(km)
質量(kg)自轉週期軌道平均速度
(km/sec)
公轉週期(days)密度(g/cm3)
水星mercury57,91024393.30e2359 days47.8987.975.4
金星venus108,20060524.87e24243 days35.03224.705.2
地球earth149,60063785.98e2424 hours29.76365.265.497
火星mars227,94033976.42e2324h,37min24.13686.983.9
木星jupiter778,330714921.90e279h,56min13.064332.711.3
土星saturn1,426,940602685.69e2610h,14min9.6410759.500.7
天王星uranus2,870,990255598.69e2517h,14min6.8130685.001.2
海王星neptune4,497,070247641.02e2616h,30min5.4360190.001.7
冥王星pluto5,913,52011601.31e226d,9h,21min4.74908002.03

月球

名稱與地球的平
均距離(km)
赤道半徑(km)質量(kg)自轉週期(days)軌道平均速度
(km/sec)
繞地球公轉
週期(days)
密度(g/cm3)
月球moon384,404.3771,7387.35e3227.321.0227.33.34