宇宙中隐藏着超重黑洞-凯发k8官网

宇宙中隐藏着超重黑洞
文章来源:未知 文章作者:enread 发布时间:2015-07-07 06:07 字体: [ ] 
(单词翻译:双击或拖选)
1 have found evidence for a large population of hidden supermassive black holes in the universe. using nasa's nuclear spectroscopic telescope array (nustar) satellite 2, the team of international scientists detected the high-energy x-rays from five supermassive black holes 3 clouded from direct view by dust and gas.
 
the research, led by astronomers at durham university, uk, supports the theory that potentially millions more supermassive black holes exist in the universe, but are hidden from view.
 
the findings are being presented at the royal 4 society's national astronomy meeting, in llandudno, wales, today (monday, july 6, 2015).
 
the scientists 5 nustar at nine candidate hidden supermassive black holes that were thought to be extremely active at the centre of 6, but where the full extent of this activity was potentially obscured from view.
 
high-energy x-rays found for five of the black holes confirmed that they had been hidden by dust and gas. the five were much brighter and more active than previously thought as they rapidly feasted on surrounding material and emitted large amounts of radiation.
 
such observations were not possible before nustar, which launched in 2012 and is able to detect much higher energy x-rays than previous satellite 7.
 
lead author george lansbury, a 8 student in the centre for extragalactic astronomy, at durham university, said: "for a long time we have known about supermassive black holes that are not obscured by dust and gas, but we suspected that many more were hidden from our view.
 
"thanks to nustar for the first time we have been able to clearly see these hidden monsters that are predicted to be there, but have previously been 9 because of their 'buried' state.
 
"although we have only detected five of these hidden supermassive black holes, when we extrapolate our results across the whole universe then the predicted numbers are huge and in agreement with what we would expect to see."


点击收听单词发音收听单词发音  

1 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》
2 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 bkzzzc     
adv.以前,先前(地)
参考例句:
  • the bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
4 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。
5 il8zb4     
adj.尖的,直截了当的
参考例句:
  • he gave me a very sharp pointed pencil.他给我一支削得非常尖的铅笔。
  • she wished to show mrs.john dashwood by this pointed invitation to her brother.她想通过对达茨伍德夫人提出直截了当的邀请向她的哥哥表示出来。
6 fa8833b92b82bcb88ee3b3d7644caf77     
星系( galaxy的名词复数 ); 银河系; 一群(杰出或著名的人物)
参考例句:
  • quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
  • we still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。
7 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
8 ulmznh     
adj.大学毕业后的,大学研究院的;n.研究生
参考例句:
  • i didn't put down that i had postgraduate degree.我没有写上我有硕士学位。
  • after college,mary hopes to do postgraduate work in law school.大学毕业后, 玛丽想在法学院从事研究工作。
9 d8vyh     
adj.难以表达(捉摸)的;令人困惑的;逃避的
参考例句:
  • try to catch the elusive charm of the original in translation.翻译时设法把握住原文中难以捉摸的风韵。
  • interpol have searched all the corners of the earth for the elusive hijackers.国际刑警组织已在世界各地搜查在逃的飞机劫持者。
tag标签: black holes hidden
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
网站地图