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。
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.
观察一颗彗星，它将往何处去？
最近他们发现了一颗彗星。
最近他们发现了一颗彗星。
最近他们发现了一颗彗星。
太阳系又少了一颗彗星。
一颗彗星的核儿几乎就是一颗货真价实的星星。
它是一颗彗星吗？
1908年可能是一颗彗星导致了俄国通古斯事件。
A comet may have been the cause of the Tunguska event in Russia in 1908.
如果一批流星体来自同一颗彗星，形成的就是流星雨。
If a batch of meteoroids comes from the same comet, the meteor shower is formed.
她还没出生的时候，一颗彗星(的碎片)掉在她祖母的后院。
When she was not even born yet, a shooting star hit her grandma's back yard.
韦斯利是木星观测老手，2009年他以发现一颗彗星撞击该行星而闻名。
Wesley is a veteran observer of Jupiter, famous for his discovery of a comet hitting the planet in 2009.
它可能是一颗彗星，流氓星球，或作为保持本书，一个垂死褐矮星的配套溶胶。
It could be a comet, rogue planet, or as this book maintains, a dying brown dwarf companion to Sol.
对那些以科学思考的人来说，他们会猜想这明星是否是一颗彗星，也许是哈雷慧星吧；
For the scientifically-minded, they wonder whether the star was a comet, perhaps Halley's comet;
你可以从月亮上目击整个日全食的过程，可以看到火星表面的落日，甚至控制一颗彗星。
You can witness a total eclipse from the Moon, watch the Sun set from the surface of Mars, or even ride a comet.
这次飞来横祸是由一颗彗星瓦解造成的，同时地球完全被无数由冰和尘埃组成的冰石所覆盖。
The catastrophe was caused by a disintegrating comet and saw the planet sprayed by thousands of frozen boulders made of ice and dust.
他们可能已经同猛犸象、短头熊、地獭和骆驼一起灭绝了。因为一颗彗星就在他们头上爆炸。
They may have gone, along with mammoths, short-headed bears, ground sloths and camels, because a comet exploded over their heads.
内皮尔教授说，在2万至3万年前，一颗彗星突然冲进太阳系内部，并且从那时起就一直被瓦解。
Prof Napier says a comet swooped into the inner solar system between 20, 000 and 30, 000 years ago and has been breaking apart ever since.
假设这个星球被一颗彗星击中-，这样的事，大约六千五百万年前，发生过，所以它还可能再发生。
Suppose the planet were hit by a comet — this happened — something like this happened sixty-five million years ago, so it could happen again.
仅仅因为我们知道有一颗彗星在1994年撞击了木星，不代表2009年撞击木星是同样的武器。
Just because we know a comet slammed into the planet in 1994, it doesn't necessarily mean the 2009 event used the same weapon.
突然，一颗彗星划过天空，带我进入了那个实现梦想的车库。就在那里，乔布斯将科学与艺术完美地融合在了一起。
Suddenly, a bright comet raced past, leading me into a small garage, where Steve Jobs changed the world by turning pure science into a real work of art.
日本科学家和美国科学家一样，掌握相似的返回样本，曾在2010年利用探测仪隼鸟号从一颗彗星羽中检测到灰尘。
The Japanese, like the Americans, have experience with sample-return of this sort, having flown a probe called Hayabusa that retrieved dust from the plume of a comet in 2010.
丹的能量和精神，他就像一颗彗星，匆匆离去，但是他一闪而过的光芒仍然留存在人们心中，而我相信，还能留存得更久。
Dan's energy and spirit... he was like a comet... he TOOK OFF — but the sparks from that comet continue to set fires in people and I think will continue to do so for a very long time.
科学家认为重氮来自一颗彗星，而重氧则是来自行星形成的自然过程，这一过程把更轻的氧同位素留在了星云中，形成了太阳。
Scientists say the excess heavy nitrogen could have come from a comet. And the heavier oxygen from a natural process that left more of the light isotope in the part of the nebula that made the sun.
一颗彗星在日本上空掠过，昭示着一系列情节的逆转，并让新海诚用他朴实的方式开始探索2011年日本地震海啸造成的创伤。
Meanwhile, a comet is passing over Japan, heralding a constellation of plot twists and allowing Shinkai to explore, in his understated way, the trauma of Japan's 2011 tsunami and earthquake.
2005年，美国宇航局的一项叫做深度撞击的科学任务，是用一块816磅重的铜质物体撞击一颗彗星，以了解其内部更冰冷的物质。
In 2005, a NASA science mission called Deep Impact crashed an 816-pound copper mass into a comet to learn more about its icy interior.
澳大利亚人安东尼·韦斯利(Anthony Wesley)发现一颗彗星或小行星曾撞击过木星，并通过电子邮件告知美国国家航空航天局。
Australian Anthony Wesley discovered that a comet or asteroid had crashed into Jupiter, and emailed Nasa to let them know.
在1781年，天文学家WilliamHerschel爵士发现天空中有个移动的物体，一开始以为是一颗彗星，后来意识到它有着行星的属性。
In 1781, astronomer Sir William Herschel spotted an object moving in the sky and originally thought it was a comet but later realized its planetary nature.
在1781年，天文学家WilliamHerschel爵士发现天空中有个移动的物体，一开始以为是一颗彗星，后来意识到它有着行星的属性。
In 1781, astronomer Sir William Herschel spotted an object moving in the sky and originally thought it was a comet but later realized its planetary nature.
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