1.
The satellite of Neptune that is second in distance from the planet.
海卫一距离海王星第二远的海王星卫星
2.
Neptune has eight moons and four rings.
海王星有8颗已知卫星和4个光环。
3.
The satellite of Neptune that is third in distance from the planet.
海王卫二海王星的卫星，离该行星的距离处于第三位
4.
comet of Neptune family
海(王)族彗(星)
5.
The only satellite of Pluto.
卡戎冥王星的唯一卫星
6.
The smaller Rocky worlds are Mercury, Venus, Earth and Mars. The four huge gas planets are Jupiter, Saturn, Uranus and Neptune.
类地行星是水星、星、球和火星。四类木行星木星、星、王星和海王星。
7.
The satellite of Uranus that is closest to the planet.
米兰达距离天王星最近的天王星卫星
8.
Correlations of satellite positions and ring features occur in the Jovian, Uranian and Neptunian systems as well.
在木星、天王星、海王星的系统中，卫星的位置也和行星环的特性密切相关。
9.
The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
我们太阳系的行星有水星、金星、地球、火星、木星、土星、天王星、海王星。
10.
The classical planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
这八颗经典行星分别是：水星、金星、火星、木星、土星、天王星和海王星。
11.
The satellite of Uranus that is fourth in distance from the planet.
天卫三距离天王星第四远的天王星卫星
12.
The satellite of Uranus that is second in distance from the planet.
天卫一距离天王星第十四远的天王星卫星
13.
The satellite of Uranus that is third in distance from the planet.
天卫二距离天王星第三远的天王星卫星
14.
ocean area reconnaissance satellite
海域侦察卫星海洋侦察卫星
15.
The planet Pluto and the moon Triton have almost the same size and density.
冥王星与海卫一几乎同样大小，同样密度。
16.
The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
我们太阳系的行星有水星、金星、地球、火星、木星、土星、天王星、海王星和冥王星。
17.
It is all because, compared with Neptune, Pluto is very small.
而和海王星比起来，冥王星体积又太小。
18.
International Maritime Satellite-B System
国际海事b>卫星b>b站