太空中并无多少空洞的空间
文章来源:未知 文章作者:enread 发布时间:2014-03-11 07:10 字体: [ ]  进入论坛
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Australian astronomers1 have shown galaxies2 in the vast empty regions of the Universe are actually aligned3 into delicate strings4, according to research published today in the Monthly Notices of the Royal Astronomical5 Society. A team of astronomers based at The University of Western Australia node of the International Centre for Radio Astronomy Research (ICRAR) has found short strings of faint galaxies in what were previously6 thought to be extremely empty parts of space.
 
The Universe is full of vast collections of galaxies that are arranged into an intricate(复杂的) web of clusters and nodes connected by long strings. This remarkably7 organized structure is often called the 'cosmic web', with busy intersections8 of galaxies surrounding vast spaces, empty of anything visible to us on Earth.
 
"The spaces in the cosmic web are thought to be staggeringly empty," said Dr Mehmet Alpaslan, who led the research. "They might contain just one or two galaxies, as opposed to the hundreds that are found in big clusters."
 
These huge, empty regions are called voids(空洞,孔洞), and for years, astronomers have been trying to understand the small population of galaxies that inhabit them.
 
Using data from the Galaxy9 and Mass Assembly (GAMA) survey, Alpaslan and his colleagues found that the small number of galaxies inside these voids are arranged in a new way never seen before.
 
"We found small strings composed of just a few galaxies penetrating10 into the voids, a completely new type of structure that we've called 'tendrils(卷须)'," said Alpaslan.
 
To discover tendrils, the GAMA team created the largest ever galaxy census11 of the southern skies using observations from the Anglo-Australian Telescope in NSW, Australia.
 
"Our new catalogue has looked deeper into space and mapped each patch of sky up to ten times to make sure it's as thorough as possible," said Dr Aaron Robotham from The University of Western Australia node of ICRAR.
 
"We weren't sure what we'd find when we looked at voids in detail, but it was amazing to find so many of these tendrils lurking12 in regions that have previously been classified as empty," said Robotham.
 
"This means that voids might be much smaller than we previously thought, and that galaxies that were previously thought to be in a void might just be part of a tendril," said Alpaslan.
 
The GAMA team plan to catalogue more tendrils for further study as their detailed13 map of the Universe expands.  


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1 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》
2 galaxies 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。
3 aligned 165f93b99f87c219277d70d866425da6     
adj.对齐的,均衡的
参考例句:
  • Make sure the shelf is aligned with the top of the cupboard.务必使搁架与橱柜顶端对齐。
4 strings nh0zBe     
n.弦
参考例句:
  • He sat on the bed,idly plucking the strings of his guitar.他坐在床上,随意地拨着吉他的弦。
  • She swept her fingers over the strings of the harp.她用手指划过竖琴的琴弦。
5 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。
6 previously 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。
7 remarkably EkPzTW     
ad.不同寻常地,相当地
参考例句:
  • I thought she was remarkably restrained in the circumstances. 我认为她在那种情况下非常克制。
  • He made a remarkably swift recovery. 他康复得相当快。
8 intersections c67ecd1980278dab3ff2b496feea84b2     
n.横断( intersection的名词复数 );交叉;交叉点;交集
参考例句:
  • Traffic lights have been placed at all major intersections. 所有重要的交叉路口都安装了交通信号灯。
  • Intersections are of the greatest importance in highway design. 在道路设计中,交叉口占有最重要的地位。 来自辞典例句
9 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。
10 penetrating ImTzZS     
adj.(声音)响亮的,尖锐的adj.(气味)刺激的adj.(思想)敏锐的,有洞察力的
参考例句:
  • He had an extraordinarily penetrating gaze. 他的目光有股异乎寻常的洞察力。
  • He examined the man with a penetrating gaze. 他以锐利的目光仔细观察了那个人。
11 census arnz5     
n.(官方的)人口调查,人口普查
参考例句:
  • A census of population is taken every ten years.人口普查每10年进行一次。
  • The census is taken one time every four years in our country.我国每四年一次人口普查。
12 lurking 332fb85b4d0f64d0e0d1ef0d34ebcbe7     
潜在
参考例句:
  • Why are you lurking around outside my house? 你在我房子外面鬼鬼祟祟的,想干什么?
  • There is a suspicious man lurking in the shadows. 有一可疑的人躲在阴暗中。 来自《现代英汉综合大词典》
13 detailed xuNzms     
adj.详细的,详尽的,极注意细节的,完全的
参考例句:
  • He had made a detailed study of the terrain.他对地形作了缜密的研究。
  • A detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。
TAG标签: empty space strings
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