They combine with dust particles from the comet to form a huge cloud.
它们与来自彗星的尘埃颗粒结合在一起，形成了巨大的云团。
As the comet gets even nearer to the sun, a solo wind blows the cloud behind the comet, thus forming its tail.
当彗星更接近太阳时，一股单独的风将云朵吹到彗星后面，它的尾巴就是这样形成的。
Every so often a comet gets flung out of the Oort Cloud, a swarm of comets on the fringes of the solar system, and gets close enough to Earth for us to see it.
经常有彗星被甩出奥尔特云(在太阳系边缘的彗星群)，并靠近地球到肉眼可以观测的距离。
The Jupiter-Saturn region would have been just the right temperature for such a comet, which is much closer to the sun than the Kuiper Belt or Oorl Cloud where most comets probably formed.
木星一土星区域有适合这种慧星存在的合适温度。它距离太阳比古比皮带和奥尔特云都要近。 这两者是大多数慧星可能形成的地方。
Serendipitously, the picture also recorded a bright, comet-shaped cloud not known to share the sky with Orion's famous stars and nebulae.
在不经意间，上面影像中还拍摄到了一条未知的彗星状明亮云带，与猎户座著名星云分享了这片天空。
When the comet approaches the sun, it begins to glow because the electron cloud is energized by the sun's proton wind.
当这颗彗星靠近太阳的时候它就开始发光因为电荷云层(electron cloud)被太阳的质子风(proton wind)激活。
When the comet approaches the sun, it begins to glow because the electron cloud is energized by the sun's proton wind.
当这颗彗星靠近太阳的时候它就开始发光因为电荷云层(electron cloud)被太阳的质子风(proton wind)激活。
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