星系

Now, in a posting on the Galaxy Zoo blog, Dr Keel and Dr Lintott suggest that the galaxy right next door to the voorwerp used to be a quasar (a very bright active galactic nucleus) that has since eaten up all its fuel.

现在，在星系动物园博客上的一个帖子中，Keel 博士和 Lintott 博士认为在"物体"旁边的星系曾经是个类星体（一种很明亮的活跃星系核），但现在已经把它的燃料给消耗光了。

The latter is achievable through Constellation Sovereignty, which is reached when half of the systems in a given constellation become official "territories" of the same alliance; three or more outposts and/or conquerable stations reside with the constellation; and at least one system is a Province—the alliance-declared capital system of that constellation.

后者是可以通过星座主权来实现：当同一星座中半数以上恒星系统都变为同一联盟的正式的"领土"主权时；在这个星座中有3个或者以上的前哨站/可夺取空间站的主权被拿下；至少有一个星系是省级星系——即联盟宣布的该星座的首府所在星系。

By the year 3,000,000,000,000, all that will be left for astronomers to observe will be the stuff that today makes up our gravitationally bound 'local group' of galaxies: the Milky Way and Andromeda, the Large and Small Magellanic Clouds , and a few other puny galaxies.

到公元3，000，000，000，000年，天文学家所能够观察到的将只剩下我们的本星系团，其中的星系由引力束缚在一起，包括：银河系和仙女座、大小麦哲伦星系和其他几个小星系。

But during the collision, one galaxy can rip the other apart gravitationally, and dust and gas common to both galaxies does collide.

但是相撞时，一个星系的重力会把另一个星系分裂成碎片，同时，星系中的尘埃和气体也会相撞。

We also show that an errroneous assumption about the geometry of the universe and different infall models only slightly change the results.

上面探讨的星系成团性和速度分布特征是与星系自身的物理性质紧密联系的，而这二者在很大程度上都依赖于星系的摇篮-暗物质晕。

The new technique reduced the distance ladder to three "rungs":(1) The distance to galaxy NGC4258 is measured using straightforward geometry and Kepler's laws;(2)Cepheids in six more distant galaxies are used to calibrate the luminosity of Type Ia supernovae;(3) The Hubble constant is measured by observing a brighter milepost marker, Type Ia supernovae, in more distant galaxies hundreds of millions of light-years away, embedded in the expanding universe.

这种新技巧简化了距离跳跃为三个"阶梯"：1、星系NGC 4258的距离采用开普勒定律和简单直接的几何方法精确测量；2、在6个更远的星系中的造父变星用来校准Ia超新星的光度；3、深嵌于数亿光年外的膨胀宇宙中的星系中的Ia超新星——一种遥远而明亮的量天尺，被用于精确测定哈勃常数。

Using the data of inclination, radius and mass of disc galaxies, the mass density and oblateness of 93 disc galaxies have been obtained.

盘星系的质量密度在研究星系的结构和演化时，星系的质量密度是一个重要的物理量。

In fact, it is part of the photogenic Sombrero Galaxy , one of the largest galaxies in the nearby Virgo Cluster of Galaxies .

事实上，这是上镜的草帽星系的一部分，草帽星系是邻近室女座星系团内最大的星系之一。

In fact, it is part of the photogenic Sombrero Galaxy, one of the largest galaxies in the nearby Virgo Cluster of Galaxies.

更具体的说，它是很上镜头的墨西哥帽星系之一部份；墨西哥帽星系是邻近室女座星系团最大的星系之一。

One of most famous spiral galaxies is Messier 104, widely known as the "Sombrero" because of its particular shape.

M104是个著名的漩涡星系，因其醒目的外形又名"草帽"星系或"墨西哥帽檐"星系。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。