The orbit of this comet intersects the orbit of the Earth.
这颗彗星的轨道和地球的轨道相交。
We were not altogether sure that the comet would miss the Earth.
我们不太确定这颗彗星是否会错过地球。
The comet is going to come back in 2061 and we are all going to be able to see it. Well, our offspring are, anyway.
这颗彗星将于2061年返回，到时我们都可以看到它。哦，无论如何，我们子孙是可以看到的。
I can hardly wait to see the new comet.
我迫不及待地想看到那颗新的彗星。
Comet Hale-Bopp, discovered in 1995 was an unusually bright comet.
1995年发现的海尔-波普彗星是一颗异常明亮的彗星。
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 a comet gets closer to the sun, some gases in it begin to unfreeze.
当彗星接近太阳时，其中的一些气体开始解冻。
As the comet nears the sun, its ice melts, releasing gas and dust that stream away into space.
当彗星靠近太阳时，它的冰层融化，释放的气体和尘埃飘向太空。
The trip from Earth by "Philae" had taken ten years! The scientists had no idea what the surface of the comet would be like.
“菲莱”号从地球出发的旅行已经花了十年的时间！科学家们不知道彗星的表面会是什么样子。
Given enough time, the comet-like planet could theoretically evaporate away completely, but it would take about a trillion years.
只要有足够时间，跟彗星一样的行星最终会完全蒸发掉，但那大约需要一万亿年。
Nevertheless, astronomers still believed that when a comet approached the Sun—where they could study it—the Sun's intense heat would remove the corrupted surface layer, exposing the interior.
尽管如此，天文学家们仍然相信，当一颗彗星接近太阳时——这是他们可以研究它的地方——太阳的高温将会移除损坏的表层，露出内部。
Watch a comet, where is it going?
观察一颗彗星，它将往何处去？
If so, life may have started in a comet.
如果是这样的话，生命也许是从彗星中开始的。
A comet is an icy body that releases gas or dust.
彗星是一个释放着气体和尘埃的冰质天体。
This has never been seen before in a comet-like object.
这种景象从未在类似彗星的观测过程中出现过。
This was the first time ocean-like water was detected in a comet.
这是首次在彗星上检测到有海洋般的水。
They observed the comet for 70 days before it faded from sight.
他们观察了这颗彗星70天，直至其慢慢从视线中消失。
A comet may have been the cause of the Tunguska event in Russia in 1908.
1908年可能是一颗彗星导致了俄国通古斯事件。
He was known as Uther Pendragon after being inspired by a dragon-shaped comet.
他因受龙形彗星的启发而以尤瑟·潘德拉贡之称闻名。
In the case of a planet, the hole is carved out by an asteroid or comet impact.
对于行星，这个洞就是由小行星或彗星碰撞打开的。
Perhaps we'll fail to mitigate the threat posed by asteroid and comet collisions.
我们也许会没能成功地减轻小行星和彗星碰撞所带来的威胁。
Between the threats of comet and weevils, the farmers were running low on optimism.
面对着彗星和棉铃象甲的双重威胁，农场主们都一筹莫展。
A bright green comet is streaking across early morning skies this week, experts say.
专家说，一颗明亮的绿色彗星这个星期正在划过清晨的天空。
Deep Impact also found evidence of ice on the surface of the comet, not just inside it.
深度撞击项目组还发现了证据表明冰不仅仅存在于彗星内部，也存在于彗星表面。
The recombined frames show off both the rich star field and faint details of the comet.
重组的图像既突出富于恒星的星野，也能展现彗星暗弱的细节。
The recombined frames show off both the rich star field and faint details of the comet.
重组的图像既突出富于恒星的星野，也能展现彗星暗弱的细节。
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