彗星在组成上与气态巨行星相似。
幸神星是太阳系奥尔特云内的一颗假设的气态巨行星的昵称。
Tyche is the nickname given to a hypothesized gas giant planet located in the Solar System's Oort cloud.
一旦质量超过这个限度，就开始进入气态巨行星的行列了。
Once the mass goes beyond that point, you start to get into gas giant territory.
之外是是四颗气态巨行星——木星、土星、天王星和海王星。
After that are four gas giants - Jupiter, Saturn, Uranus and Neptune.
正如在我们的太阳系一样，恒星与其气态巨行星之间相隔甚远。
As in our solar system, vast distances stretch between these stars and their gas giants.
古尔德说，比如一些星系只拥有类似地球的行星而没有气态巨行星。
For instance, some systems could house only Earthlike planets and no gas giants, Gould said.
描述：1994年，休梅克·利维彗星碎片撞击气态巨行星木星。
Caption: Fragments of Comet Shoemaker-Levy slam into the gas giant Jupiter in 1994.
木星是“气态巨行星”中的巨人，其质量比第二大的土星大出两倍多。
Jupiter is the Titan among planets called the "gas giants," with more than three times the mass of Saturn, the next largest.
这个名字源于18世纪，当时望远镜威力还不够强大，无法区分星云和气态巨行星。
The name originates from the 18th century, when telescopes weren't powerful enough to distinguish nebulae from gas giant planets.
然而在外部区域，太阳风变得十分温和，使得由氢和氦构成气态巨行星得以存在。
The solar wind was much weaker in the outer regions, however, resulting in gas giants made up mostly of hydrogen and helium.
目前与恒星相伴的行星都是那场角力中的幸存者，并不能说明实际上有多少气态巨行星形成。
That's because planets bound to a parent star would only reflect the survivors, not how many gas giant planets actually formed.
雅文4号卫星是环绕气态巨行星雅文运行的丛林卫星。这个偏远的世界是银河历史上的焦点。
A remote world that became a focal point in galactic history, Yavin 4 is a jungle moon orbiting the gas giant of Yavin.
在冷却了一百亿年后，大型气态巨行星的半径将非常近似于木星，但质量越高，半径却会略微缩小。
After 10 billion years of cooling, large gas giants are all very nearly Jupiter's radius, but more massive objects are slightly smaller.
问题是，迄今观测到的大部分外部行星——气态巨行星，太靠近他们的起源恒星，不可能在那里诞生。
The problem is that most of the exoplanets detected to date, being gas giants, are too close to their stars to have been born there.
如图所示，我们太阳系中的气态巨行星——木星、土星、天王星、海王星——大部分是由氢构成的。图片来自。
As indicated in the graphic, the gas giant planets of our solar system - Jupiter, Saturn, Uranus and Neptune - are mostly composed of hydrogen. Image courtesy of NASA.
第一个气态巨行星的另一个功效，是它的重力会把附近的微行星远远抛向系统外侧区域，让它们在该处形成新的世界。
Another effect of the first gas giant is that its gravity tends to fling nearby planetesimals to the outer reaches of the system, where they can form new planets.
此外，对木星的研究表明，外层的气态巨行星能充当盾牌的作用，保护内部岩态行星——和行星上的任何生命形态——免遭频繁光顾的小行星撞击。
What's more, studies of Jupiter suggest that outer gas giants can act as gravitational shields, protecting inner rocky worlds-and any life-forms on them-from frequent asteroid impacts.
最近的工作重点考查这一类型的星系：星系中具有类似木星一样的巨形气态行星。
The latest work focuses on a type of star system that contains gas giants known as hot Jupiters.
同我们太阳系的巨形气态行星不同，炽热的木星具有更靠近恒星的轨道。西恩·雷蒙德说。
Unlike gas giants in our solar system, hot Jupiters have orbits that swing tightly around their stars, says Sean Raymond, study co-author and astrophysicist at the University of Colorado in Boulder.
同我们太阳系的巨形气态行星不同，炽热的木星具有更靠近恒星的轨道。西恩·雷蒙德说。
Unlike gas giants in our solar system, hot Jupiters have orbits that swing tightly around their stars, says Sean Raymond, study co-author and astrophysicist at the University of Colorado in Boulder.
应用推荐