右边被蓝色旋臂环绕的是旋涡星系m 81。
On the right, surrounded by blue spiral arms, is spiral galaxy M81.
有些旋涡星系几乎是侧面对着我们的。
在旋涡星系的光谱中有一种奇妙的特征。
There is a curious feature in the spectra of spiral galaxies.
旋涡星系被认为是由恒星组成的引力束缚系统。
Spiral galaxies are considered to be gravitationally bound configurations of stars.
它看起来是一个旋涡星系，但可能是一个棒旋星系。
当人们考虑旋涡星系是如何转动的时候难题就来了。
The mystery arises when one considers how a spiral galaxy rotates.
M31(仙女星系)是本星系群中最大的旋涡星系。
M31 (Andromeda galaxy) is the biggest spiral in the Local Group.
称作球状星团的小型恒星团体经常环绕在旋涡星系周围。
Smaller groups of stars called globular clusters often surround spiral galaxies.
上面的照片，纹理细致的尘带环绕着旋涡星系明这发光的中心，美轮美奂。
Pictured above, finely textured dust lanes surround the brightly glowing center of this picturesque spiral.
解说：近年来最明亮的超新星之一出现在了临近的旋涡星系（M51）中。
Explanation: One of the brightest supernovas in recent years has just been recorded in the nearby Whirlpool galaxy (M51).
在上面图中，你能找到：一彗星，一旋涡星系，一疏散星团和一超新星遗迹吗？
Can you find, in the above image, a comet, a spiral galaxy, an open star cluster, and a supernova remnant?
邻近旋涡星系中观测到的磁场被理论学家解释为发电机作用的结果。
The observed magnetic fields in nearby spiral galaxies are interpreted as the results of dynamo actions by theorists.
介绍了本星系群中最大的旋涡星系M31（仙女星系）的基本观测性质。
Observational properties of the largest Local Group spiral M31(Andromeda galaxy) are presented.
下载高分辨画面找寻一些梅西尔远方旋涡星系的精致图像，还有猫头鹰星云。
Download the higher resolution image to hunt for exquisite views of some of Messier's distant spiral galaxies and a more local owl.
也许旋涡星系m51原本是一个巨大的星系，直径超过6万光年，有显尔易见的旋涡结构。
Perhaps the original spiral nebula, M51 is a large galaxy, over 60, 000 light-years across, with a readily apparent spiral structure.
后发星系团及其它星系团的许多星系是椭圆星系，而星系团外面的许多星系是旋涡星系。
Most galaxies in Coma and other clusters are ellipticals, while most galaxies outside of clusters are spirals.
画面上方横着的是遥远的星星之河和暗尘云，这是旋涡星系我们的银河系银盘的一部分。
Across the top of the image runs a distant stream of bright stars and dark dust that is part of the disk of our spiral Milky Way Galaxy.
最近十几年来，银河系已被确认为是一个棒旋星系，而不是无棒结构的普通旋涡星系。
Therefore, our Milky Way should be morphologically catalogued as a barred spiral galaxy instead of a normal spiral one.
基于密度波理论的非线性方程，用定性分析理论可导出旋涡星系的演化方向和由观测可得到的演化条件。
Based on the nonlinear equations of the theory of density wave, the evolutionary direction and the observable conditions on spiral galaxies may be derived by the qualitative analysis theory.
仙女星系是距银河最近的巨型旋涡星系，它以其所在星座仙女座命名，同时又被称为M31，它是本星系群中最大成员。
The nearest major spiral galaxy to the Milky Way, Andromeda, named after its constellation and also known as M31, is the largest galaxy in the Local Group of Galaxies.
在理论上研究其形成和演化历史，同时与银河系进行比较将非常有利于进一步理解旋涡星系的形成和演化过程。
By studying the star formation history and chemical evolution of M31. and comparing with the Milky Way Galaxy, we are able to understand more about the formation and evolution of spiral galaxies.
支持这一观点的证据在这张广角深空照片中清晰可辨，包括旋涡星系特有的暗尘埃带，以及暗淡的恒星和气体漩涡。
Supporting evidence includes the dark dust lanes characteristic of a spiral galaxy, and faint swirls of stars and gas visible in this wide and deep image.
巨大美丽的旋涡星系ngc 1055是6000万光年远的一个小星系群的主要成员，在可怖的鲸鱼座(传说中的海怪)方向。
Big, beautiful spiral galaxy NGC 1055 is a dominant member of a small galaxy group a mere 60 million light-years away toward the intimidating constellation Cetus.
因此，天文爱好者们都被鼓动了起来，尽可能频繁地拍摄旋涡星系，以此填补世界上最强大的望远镜的间歇性观察当中的时间空隙。
Therefore, sky enthusiasts are encouraged to image the Whirlpool galaxy as often as possible to fill in time gaps left by intermittent observations made by the world's most powerful telescopes.
星系晕本身又被暗淡的窄形结构缠绕，显示大约100亿年前一个卫星系被这个大的旋涡星系瓦解后残留物的混合与分散。
The halo itself is laced with faint, narrow structures, and could represent the mixed and spread out debris from a satellite galaxy disrupted by the larger spiral some 10 billion years ago.
星系NGC 3628扭曲的形状和黯淡的潮汐尾表明，它与狮子座三重星系的另两位旋涡星系成员M66和M65由于引力而相互作用着。
The distorted shape and faint tidal tail suggest that NGC 3628 is interacting gravitationally with the other spiral galaxies in the Leo triplet, M66 and M65.
他们的调查表明，NGC 1316这个巨大的椭圆星系大约在1亿年前开始吞噬位于照片上方、体型较小的旋涡星系邻居NGC 1317。
Their investigation indicates that NGC 1316 is an enormous elliptical galaxy that started, about 100 million years ago, to devour a smaller spiral galaxy neighbor, NGC 1317, just above it.
他们的调查表明，NGC 1316这个巨大的椭圆星系大约在1亿年前开始吞噬位于照片上方、体型较小的旋涡星系邻居NGC 1317。
Their investigation indicates that NGC 1316 is an enormous elliptical galaxy that started, about 100 million years ago, to devour a smaller spiral galaxy neighbor, NGC 1317, just above it.
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