它扁平的形状意味着土卫八曾经旋转得非常快，完成一次自转需要16个小时。
Its flattened shape implies that Iapetus once spun very quickly, completing a rotation in 16 hours.
这个活动通常是一次完成的，并且这是必需的，因为它提供了所需的缺省值。
This activity is usually done once, and is necessary since it provides the required defaults.
像塔图因星球一样，行星在那里非常热-它离绕行的主恒星非常近，每3.5天完成一次公转。
Like Tatooine, the planet there is likely pretty hot-it orbits very close to the main star, completing one orbit every 3.5 days.
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