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。
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。
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。
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。
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。
Comet Hartley 2 became active recently as it neared the sun and sunlight warmed the comet.
哈雷2号彗星最近接近了太阳，因阳光照射而变暖，从而变得非常活跃。
Of course, the comet and background stars move at different rates through planet Earth's skies.
当然，彗星和背景恒星在行星地球的天空中运行速度是不一样的。
Now space experts want to see how the comet has changed after its tour around the scorching sun.
现在专家期待着观察彗星在环绕灼热太阳飞行之后会发生怎样的变化。
But the moon, which was dry at this point, received a majority of its water via comet collisions.
但是，月球，当时是干燥的，通过彗星碰撞接受了大部分水。
Does Halley's comet intentionally pose for the telescopes before whizzing off for another 75 years?
哈雷彗星是否故意在下一个75年呼啸而过之前在天文望远镜前摆好姿势？
Since comet tails are shaped by sunlight and the solar wind, they always point away from the sun.
由于彗尾是因为太阳光和太阳风成形的，所以彗尾一般背向太阳。
A new comet is brightening and is now expected to become visible to the unaided eye later this month.
一颗新彗星在变亮，并有望在本月下旬变成肉眼可见。
Can you find, in the above image, a comet, a spiral galaxy, an open star cluster, and a supernova remnant?
在上面图中，你能找到：一彗星，一旋涡星系，一疏散星团和一超新星遗迹吗？
The comet spotted last week in the constellation Cetus should continue to brighten as it approaches the Sun.
上周在鲸鱼座发现的这颗彗星将在它接近太阳的过程中不断变亮。
When a comet gets close to the sun, melting ice releases pieces of dust, most no larger than grains of sand.
当彗星接近太阳时，它表面的冰壳开始融化分解成大大小小的碎片，大多数碎片并不会比沙粒更大。
According to Marsden's calculations, this comet reaches its closest point to the Sun (perihelion) on March 18th.
根据Marsden的计算，这颗彗星会在3月18日过近日点。
According to Marsden's calculations, this comet reaches its closest point to the Sun (perihelion) on March 18th.
根据Marsden的计算，这颗彗星会在3月18日过近日点。
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