The largest terrestrial planet, Earth has a diameter only one quarter as great as the diameter of the smallest Jovian planet, Neptune, and its mass is only one seventeenth as great.

最大的类地行星地球的直径仅仅是最小的类木行星海王星的四分之一，而且地球的质量仅仅是其质量的十七分之一。

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The planet was eventually named Neptune, after the Roman god of the sea.

这颗行星最终以罗马神话中的海神命名，称为海王星。

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As it passed the planet Neptune, Voyager turned its cameras back toward the distant Earth and took a picture of the Earth as a pale blue dot.

当航行者一号探测器飞过海王星时，它面向身后遥远的地球打开所携带的照相机，拍下了一张地球的照片，这张照片就象是一个暗淡蓝点。

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Small changes in the movement of Neptune led several astronomers to believe that an undiscovered planet was affecting Neptune's orbit.

VOA: special.2010.07.11

Percival Lowell also studied the effect of gravity on the planet Neptune.

VOA: special.2010.07.11

Unidentified Man: Is Neptune a planet, because everybody knows that Neptune's orbit is crossed by Pluto's.

NPR: Pluto, the Un-Planet?

In 1989, after a 12-year, 4-billion-mile space journey, Voyager 2 flew over the cloudtops of the giant planet Neptune and its moon Triton, sending back photographs of swampy areas, frozen lakes and craters.

CNN: Tuesday,

Uranus, the next planet in from Neptune, is almost as mysterious, but for a different reason: its almost featureless green surface provides few clues to the goings-on in its atmosphere.

ECONOMIST: Comparative meteorology