星系

在我们的星系中每10年至少有一颗超新星出现。

At least one supernova occurs per decade in our galaxy .

在我们自己的星系里可能有数以万计的行星系。

Within our own galaxy there are probably tens of thousands of planetary systems .

这就使得科学家推测还有其他星系存在。

This has led scientists to speculate on the existence of other galaxies .

他们把望远镜转向附近其他星系。

They turned their telescopes towards other nearby galaxies

从该星系中心收到的无线电信号证实了黑洞理论。

Radio signals received from the galaxy 's centre back up the black hole theory

天文学家们发现了一个遥远的星系。

Astronomers have discovered a distant galaxy .

对银河系的研究表明，遥远星系在太空中的分布并不像理论所预言的那样均匀。

Galactic surveys show that distant galaxies are not as evenly distributed in space as theory predicts .

通过测量星系在一个星系团内的运动，天文学家们可以推定这个星系团的质量。

By measuring the motion of the galaxies in a cluster , astronomers can infer the cluster 's mass .

认为我们是数以万亿计的星系150亿年宇宙演化的最终结果的观念

the idea that we are the culmination of fifteen billion years of cosmic evolution across trillions of galaxies .

为了解释这一点，他们假定各星系一定包含了大量无法探测到的不明物质。

To explain this , they hypothesise that galaxies must contain a great deal of missing matter which cannot be detected

据知，这条定律同样适用于距离至少几十亿光年之远的星系。

This law is known to hold true for galaxies at a distance of at least several billion light years .

我们不知道宇宙中有多少个星系。

We still don 't know how many galaxies there are in the universe .

每一星系都有无数的恒星

Each galaxy contains myriads of stars .

亮处是暗物质最集中的地方，星系就是在这里形成的。

The bright areas are where dark matter is most concentrated , and it 's here that galaxies form .

系外行星特征卫星将研究的许多行星体积都大于我们的地球，但小于海王星，这个大小居中的体积在我们的星系中似乎占主导地位。

Many of the planets to be studied by Cheops , are bigger than our Earth , but smaller than Neptune1 , an in-between size that seems dominant2 in our galaxy3 .

然而，近来，这四种基本力已无法解释一些现象，比如星系的运动，甚至是宇宙存在的根本原因。

But in recent times , these forces haven 't been able to explain a few things , such as the movement of galaxies3 , or indeed why the Universe exists at all .

新发现的X射线选活动星系核、白矮星和激变变星

Discovery of X-ray Selected AGNs , a White Dwarf and a Cataclysmic Variable

宇宙X射线背景辐射与活动星系核

Cosmic X-Ray Background Radiation and Active Galactic Nuclei

通过分析该样本中的活动星系核的宽波段能量分布，确认了来自射电、光学和X射线波段的辐射光度之间的显著相关性。

The broad band energy distribution of the AGNs in the authors ' sample is shown .

我们得到了活动星系核在B、V波段合理的光变曲线以及光谱斜率和光度之间的正相关性。

We get reasonable light curves in B and V bands and find a positive correlation between variability and spectral slope .

所有超脉泽星系显示出核的活动，显然，脉泽是由核活动所产生的射电和X射线光子或激波来抽运的。

The AGN apparently produces the seed radio photons and the X-ray photons or shock waves need to pump the maser material .

COMA星系团的研究2.星系的成员概率

Studies on the Coma Cluster 2 . membership probabilities of individual galaxies

面向OLAP的UML星系模式的构造

Constructing UML Galaxy Diagram for OLAP

活动星系核的铁Kα和铁Kβ发射线&Cerenkov线状辐射的进一步证据

Iron K α and K β Lines in Active Galactic Nuclei ( AGNs ) - Evidence of the Existence of the Cerenkov Line-Like Radiation

旋涡星系中Ia超新星的产生率比椭圆星系的要高。

Spirals are more efficient SNe Ia producers , comparing with elliptical galaxies .

这是因为许多X射线双星和活动星系核的周期性光变与盘的不稳定性密切相关。

This is because a lot of quasi-periodic variations in X-ray binaries and active galactic nuclei are believed to be related to the instabilities of the disk .

强烈的X射线爆炸引起天文学家们的注意，它发生在到离地球大约7亿光年的星系中心附近。

A powerful X-ray blast drew the attention of astronomers to the event , located near the center of a galaxy about 700 million light-years from Earth .

星系通常分为正常星系（NG）与活动星系（AG）两类。

Galaxies can be divided into two classes : normal galaxy ( NG ) and active galaxy ( AG ) .

新发现的6个X选类星体和1个Seyfert星系

Discovery of Six New X ray selected Quasars and a New Seyfert Galaxy from the ROSAT All Sky Survey

Virgo星系团内次结构的特征尺度

Characteristic Scales of Sub structrues in the Virgo Area