What, for example, is the fraction of planets that form life?
比如说，到底有多少行星上可以形成生命呢？
I saw there were people just like us on endless Numbers of planets.
我看到在无穷无尽的行星上有很多像我们一样的人。
This family of planets, with their moons, is known as the solar system.
这个行星家庭以及它们的卫星，就是我们所知道的太阳系。
Such a definition would greatly expand the list of planets in the solar system.
这一定义将会大大地加长太阳系行星的名单。
Not until recently did scientists the number of planets in our solar system.
直到最近科学家才能确定太阳系中行星的数量。
"There are a large number of planets, and most of them are small," Stern said.
行星数目众多，绝大多数都很小。
Not until recently did scientists determine the number of planets in our solar system.
直到最近科学家才能确定太阳系中行星的数量。
One version of the definition would have actually boosted the number of planets to 12;
其中一个版本的定义将使得行星的数目大增，达到12个；
The theory supposes the existence of life on other planets.
这个理论假定其他行星存在生命。
The picture shows six of the nine planets in the solar system.
这张图片展示太阳系9个行星中的6个行星。
Is it the distance of the planets from the Sun?
它是行星到太阳的距离吗？
Planets form from a disk of gas and dust swirling around a young star.
行星是由围绕着年轻恒星旋转的气体和灰尘的盘状物所组成。
Schulze-Makuch is the author of two books about life on other planets.
舒尔茨-马库奇是两本有关其它星球上生命的书作者。
Astronomers had thought that the orbits of the planets were predictable.
天文学家早就认为，几大行星的轨道是可以预测的。
Some 80% of the planets Dr Mayor has found have siblings.
梅尔博士发现的行星中80%都有兄弟行星。
Look, take the argument of the planets, the Morning Star and the Evening Star example.
拿行星的论证，晨星和昏星的那个例子来说。
The Earth is only one of the numerous planets.
地球只是众多星球中的一个。
哪颗行星是蓝色的？
The earth is one of mine planets which move in orbit round the sun.
地球是沿轨道围绕太阳运行的九大行星之一。
That is because these planets are composed of gas.
这是因为这些行星都由气体构成。
Planet the earth is one of the planets that move around the sun.
地球是绕太阳运转的行星之一。
Do they have planets capable of supporting life?
它们是否拥有能维持生命的行星？
The planets were the object of his study.
这些行星是他研究的目标。
The Earth and other planets are satellites of the sun.
地球和其他行星都是太阳的卫星。
Satellites sent back the photographs of other planets to earth by way of radio.
卫星通过无线电波把它们所拍的其他星球的照片送回地球。
The question of whether life exists on other planets preoccupied the boy's mind.
那男孩心中老是想着其它星球上是否存在生命这一问题。
"Clearly these planets are only the tip of the iceberg," said Mayor.
“明摆着嘛，这些行星只是冰山一角，”Mayor说。
"Clearly these planets are only the tip of the iceberg," said Mayor.
“明摆着嘛，这些行星只是冰山一角，”Mayor说。
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