Which planets can sustain life?
哪些行星可以维持生命的存在？
Does life exist on other planets?
其他行星上有生命吗？
The theory supposes the existence of life on other planets.
这个理论假定其他行星存在生命。
All the planets orbit the Sun in roughly the same plane, around its equator.
所有行星基本在同一个平面上围绕太阳赤道运转。
Is there intelligent life on other planets?
在其他星球上存在具有智力的生命吗？
Is it the distance of the planets from the Sun?
它是行星到太阳的距离吗？
There is a more violent theory about how planets form.
关于行星是如何形成的，还有一种更为激烈的理论。
When astronomers have found the star, they look at the planets around it.
当天文学家发现了这颗恒星，他们就会观察它周围的行星。
If those planets are out there, we should be finding them pretty soon.
如果那里真有那些行星，我们应该很快就会找到它们。
The most popular one is that they may contain visitors from other planets.
最常见的一种说法是它们可能包含来自其他行星的访客。
It would have been warm enough on these planets for liquid water to exist.
这些行星上的温度足够高，足以让液态水存在。
The most obvious difference between the terrestrial and the Jovian planets is their size.
类地行星和类木行星之间最明显的区别是它们的大小。
Not only the planets but also the sun is in constant motion.
不仅是行星而且太阳也在不断地运动。
That is because these planets are composed of gas.
这是因为这些行星都由气体构成。
The Earth is only one of the numerous planets.
地球只是众多星球中的一个。
This means the moon can act as a stepping stone to other planets.
这就意味着月球可以充当一个去其他行星的中转站。
How many planets are we dealing with here?
我们与这里多少行星有联系？
It will also help with the search for extrasolar planets.
它还能帮助寻找太阳系以外的行星。
The planets are being little gremlins this month, dear Aries.
亲爱的白羊们，这个月的行星有点像小捣蛋鬼。
The matter from the explosion will eventually form new stars and planets.
此次爆炸产生的物质最终会形成一些新星和星球。
And why do the planets orbit the sun?
为什么行星绕着太阳转呢？
New planets are still being found.
新的行星正在不断被发现。
What about the planets? What about the sun? What about the moon?
那么行星呢，太阳和月亮会怎么样呢？
哪颗行星是蓝色的？
Stars and their planets can influence one another in subtle but inevitable ways.
恒星及其行星以一种微妙而必然的方式产生相互影响。
This shows that the planets in question are, indeed, real.
两份权威性的报道显示了观测到的确实是行星。
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。
We know that that's not true for planets.
但我们知道，行星的情况不同。
We know that that's not true for planets.
但我们知道，行星的情况不同。
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