planetary satellite

• 行星卫星

planetary satellite的用法和样例：

例句

1. One of the four brightest satellites of Jupiter and the sixth in distance from the planet. Originally sighted by Galileo, it is the largest planetary satellite.
   卡利斯托卫星木星最亮的四颗卫星之一，是距木星第六远的卫星。最初为伽利略所发现，它是最大的行星卫星