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.
研究人员们表示暗物质究竟包含什么对于他们的结果起着非常关键的作用，因为根据他们的理论，星系位于更大的球状结构——星系晕的包围之中，而星系晕是由不可见物质构成。
The researchers said the inclusion of dark matter is likely crucial to their results, because theory predicts that galaxies sit inside larger spheres, called halos, of the invisible stuff.
但是除了我们略知一二的更遥远背景星系以外，这张深空图像也提示了一个罕见的盒状内晕，在星系多尘的盘面之上和之下伸展到很远。
But along with a smattering of more distant background galaxies, the deep image also reveals a curious box-shaped inner halo extending far above and below this galaxy's dusty plane.
计算机模拟显示银河晕中的恒星起源于更古老星系的相互碰撞和撕裂产物。
Computer simulations show that stars of the Milky Way's halo originated in older galaxies torn apart by collisions.
科学家们补充说，星系的暗物质晕可能会影响到星系自身的演化过程并决定星系的形态——椭圆状或者是涡旋状。
The behavior of a galaxy's dark matter halo could affect its evolution and help determine whether it becomes a spiral or an elliptical, they added.
所以物理学家提出星系被不可见物质的晕圈所包围。
So physicists proposed that the galaxies are surrounded by halos of invisible matter.
目前的星系形成理论认为，盘状星系由暗晕中的重子物质冷却并坍缩而成。
In the current paradigm of galaxy formation, disk galaxies are assumed to form by the cooling and condensation of baryons within dark matter halos.
通过适当选择这两个参量，模型预言的暗晕中星系的分布函数和半解析模型的结果符合得非常好。
With a reasonable choice for these two parameters, our model predicts an occupation number distribution of galaxies in halos which agrees very well with the predictions of semi-analytical models.
在更大的尺度上，有人相信，由于存在著类似的晕体，星系团才凝聚在一起。
On larger scales, analogous halos are thought to keep clusters of galaxies bound together.
至少螺旋星系的核球与晕，以及某些椭圆星系，可能是由此种碰撞产生的。
At least some elliptical galaxies, as well as the bulges and halos of spiral galaxies, may have arisen from such collisions.
该图像突出了星系的结构：一个微妙的，围绕着一个明亮的红色隆起核，并联运行的尘埃带星蓝盘，以及一个透明的外晕。
The image highlights the galaxy's structure: a subtle, reddish bulge surrounding a bright nucleus, a blue disk of stars running parallel to the dust lane, and a transparent outer halo.
该图像突出了星系的结构：一个微妙的，围绕着一个明亮的红色隆起核，并联运行的尘埃带星蓝盘，以及一个透明的外晕。
The image highlights the galaxy's structure: a subtle, reddish bulge surrounding a bright nucleus, a blue disk of stars running parallel to the dust lane, and a transparent outer halo.
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