先驱者11号：注视土星的观测者

先驱者11号（Pioneer 11）在47年前成为首个飞掠土星的航天器，首次近距离揭示了这颗环状行星的真容。该任务在行星科学史上具有里程碑意义。

Pioneer 11 made history 47 years ago today when it became the 1st spacecraft to fly past Saturn, revealing the ringed world up close for the 1st time. The post Pioneer 11: Watching the Saturn Watchers first appeared on EarthSky .