科学家首次追踪到快速无线电波暴
文章来源:未知 文章作者:enread 发布时间:2016-02-28 06:17 字体: [ ]  进入论坛
(单词翻译:双击或拖选)
For the first time a team of scientists has tracked down the location of a fast radio burst (FRB), confirming that these short but spectacular flashes of radio waves originate in the distant universe. The breakthrough, published today in the journal Nature, was made using CSIRO radio telescopes in eastern Australia and the National Astronomical1 Observatory2 of Japan's Subaru telescope in Hawaii. "Our discovery opens the way to working out what makes these bursts," Dr Simon Johnston, Head of Astrophysics at CSIRO and a member of the research team said.
 
FRBs emit as much energy in one millisecond as the sun emits in 10,000 years, but the physical phenomenon that causes them is unknown.
 
This, and their apparently3 huge distances, have tantalised scientists since their discovery in 2007. Only 16 bursts have ever been found but astronomers4 estimate that they might occur 10,000 times a day across the entire sky.
 
Today's paper in Nature records a burst from a host galaxy5 around six billion light-years away.
 
Importantly, it also confirms that FRBs can be used to find matter in the universe that had 'gone missing'.
 
Astronomers think the contents of the universe are 70 per cent dark energy, 25 per cent dark matter and 5 per cent ordinary matter.


点击收听单词发音收听单词发音  

1 astronomical keTyO     
adj.天文学的,(数字)极大的
参考例句:
  • He was an expert on ancient Chinese astronomical literature.他是研究中国古代天文学文献的专家。
  • Houses in the village are selling for astronomical prices.乡村的房价正在飙升。
2 observatory hRgzP     
n.天文台,气象台,瞭望台,观测台
参考例句:
  • Guy's house was close to the observatory.盖伊的房子离天文台很近。
  • Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次。
3 apparently tMmyQ     
adv.显然地;表面上,似乎
参考例句:
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
4 astronomers 569155f16962e086bd7de77deceefcbd     
n.天文学者,天文学家( astronomer的名词复数 )
参考例句:
  • Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
  • Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪,为什么只有土星有光环。 来自《简明英汉词典》
5 galaxy OhoxB     
n.星系;银河系;一群(杰出或著名的人物)
参考例句:
  • The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
  • The company has a galaxy of talent.该公司拥有一批优秀的人才。
TAG标签: energy radio waves
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片