海尔波普彗星在位于海王星轨道上方出现，因其与太阳之间距离足够远，所以并未出现脏尾。-约翰·迈特森报道。
Comet Hale-Bopp has been spotted beyond the orbit of Neptune, far enough from the sun to be without its dirty tail. John Matson reports.
轨道的支架也是相同的间距，每一样构件都很紧凑。
The trestles for the rails are also on the same spacing and everything is tied together.
同样，由于月亮轨道并不是一成不变，有轻微的变动，所以每次月球运行至近地点的位置与地球的间距是不一样的。
Likewise, because the size of the moon's orbit varies slightly, each perigee is not always the same distance away from Earth.
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