超新星残骸W44近期发生爆炸

时间：2012-11-15 03:51:43

（单词翻译:单击）

The aftershock of a stellar explosion rippling1 through space is captured in this new view of supernova（超新星） remnant W44, which combines far-infrared and X-ray data from ESA's Herschel and XMM-Newton space observatories2. W44, located around 10,000 light-years away within a forest of dense3 star-forming clouds in the constellation4 of Aquila, the Eagle, is one of the best examples of a supernova remnant interacting with its parent molecular5 cloud.
 
The product of a massive star that has already reached the end of its life and expelled its outer layers in a dramatic explosion, all that remains6 of the stellar behemoth（巨兽，河马） is the spinning core of a neutron7 star, or pulsar.
 
Identified as PSR B1853+01, the pulsar（脉冲星） is the bright point to the top left in W44, coloured light blue in this image.
 
It is thought to be around 20,000 years old and as it rapidly rotates it sweeps out a wind of highly energetic particles and beams of light ranging from radio to X-ray energies.
 
The centre of the supernova remnant is also bright in X-rays, coming from the hot gas that fills the shell, at temperatures of several million degrees. Dense knots of high-energy emission8 reflect regions where heavier elements are more commonly found.
 
At the cooler edge of the cavity, gas is swept up as the supernova remnant propagates through space.
 
At the top right of the expanding shell, there is a smaller cavity, with the shock from the supernova remnant impacting the bight arc-shaped feature. This region is filled with hot gas that has been ionised by the intense ultraviolet radiation from embedded9 young massive stars.
 
Herschel's far-infrared eyes can also seek out regions of gently heated gas and dust further from W44, where new stars are congregating10.
 
Examples include the arrowhead-shaped star-formation region to the right of W44, which appears to point to another trio of intricate（复杂的） clouds further to the right and above.
 
More broadly, a number of compact objects scattered11 across the scene map the cold seeds of future stars that will eventually emerge from their dusty cocoons12（蚕茧）.
 
Finally, diffuse13 purple emission towards the bottom left of the image provides a glimpse of the Galactic plane.

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1 rippling b84b2d05914b2749622963c1ef058ed5     
起涟漪的，潺潺流水般声音的
参考例句：
  • I could see the dawn breeze rippling the shining water. 我能看见黎明的微风在波光粼粼的水面上吹出道道涟漪。
  • The pool rippling was caused by the waving of the reeds. 池塘里的潺潺声是芦苇摇动时引起的。
2 observatories d730b278442c711432218e89314e2a09     
n.天文台，气象台( observatory的名词复数 )
参考例句：
  • John Heilbron, The Sun in the Church: Cathedrals as Solar Observatories, 3-23. 约翰．海耳布隆，《教会里的太阳：教堂即太阳观测台》，第3-23页。 来自互联网
  • Meteorologists use satellites, land observatories and historical data to provide information about the weather. 气象学家使用卫星、上天文台和历史资料来提供有关天气的信息。 来自互联网
3 dense aONzX     
a.密集的，稠密的，浓密的；密度大的
参考例句：
  • The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
  • The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。
4 constellation CptzI     
n.星座n.灿烂的一群
参考例句：
  • A constellation is a pattern of stars as seen from the earth. 一个星座只是从地球上看到的某些恒星的一种样子。
  • The Big Dipper is not by itself a constellation. 北斗七星本身不是一个星座。
5 molecular mE9xh     
adj.分子的；克分子的
参考例句：
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时，分子的碰撞就停止了。
6 remains 1kMzTy     
n.剩余物，残留物；遗体，遗迹
参考例句：
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
7 neutron neutron     
n.中子
参考例句：
  • Neutron is neutral and slightly heavier than the proton.中子是中性的，比质子略重。
  • Based on the neutron energy,the value of weighting factor was given.根据中子能量给出了相应的辐射权重因子的数值。
8 emission vjnz4     
n.发出物，散发物；发出，散发
参考例句：
  • Rigorous measures will be taken to reduce the total pollutant emission.采取严格有力措施，降低污染物排放总量。
  • Finally,the way to effectively control particulate emission is pointed out.最后，指出有效降低颗粒排放的方向。
9 embedded lt9ztS     
a.扎牢的
参考例句：
  • an operation to remove glass that was embedded in his leg 取出扎入他腿部玻璃的手术
  • He has embedded his name in the minds of millions of people. 他的名字铭刻在数百万人民心中。
10 congregating 0a33bbc34a3b0a1f206b9740da561dcf     
（使）集合，聚集( congregate的现在分词 )
参考例句：
  • The spatial distribution patterns of larvae and pupae are congregating distribution. 幼虫和蛹的空间分布均为聚集分布。
  • He says victims of violence are congregating there because they feel safer. 他说暴力的受害者聚集在这里因为他们觉得更安全。
11 scattered 7jgzKF     
adj.分散的，稀疏的；散步的；疏疏落落的
参考例句：
  • Gathering up his scattered papers,he pushed them into his case.他把散乱的文件收拾起来，塞进文件夹里。
12 cocoons 5dceb05da0afff0d0dbbf29f10373b59     
n.茧，蚕茧( cocoon的名词复数 )v.茧，蚕茧( cocoon的第三人称单数 )
参考例句：
  • The silkworms have gone into the bushes to spin their cocoons. 蚕上山了。 来自《现代汉英综合大词典》
  • In two more days the " little darlings" would spin their cocoons. 再得两天，“宝宝”可以上山。 来自汉英文学 - 春蚕
13 diffuse Al0zo     
v.扩散；传播；adj.冗长的；四散的，弥漫的
参考例句：
  • Direct light is better for reading than diffuse light.直射光比漫射光更有利于阅读。
  • His talk was so diffuse that I missed his point.他的谈话漫无边际，我抓不住他的要点。

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