The two-pronged tail in this system may have formed because gas has been stripped from the two major spiral arms in ESO 137-001.
在这个系统里出现分成两叉的尾巴是因为被吹散的气体来自于ESO 137-001的两个主要的漩臂。
New infrared images of the Milky Way show just two major spiral arms, Scutum-Centaus and Perseus, along with a newly discovered arm called Far 3kpc Arm.
左边是银河系的目前结构，显示其两条主螺旋臂，右边是较早的银河系图像，有四条主螺旋臂。
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.
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 findings confirm an earlier observation by a team of astronomers, making a strong case that the Milky Way has two major spiral arms, a common structure for galaxies with bars.
此发现证实了一个天文学家小组先前获得的观察：银河系有两条主要的螺旋臂，是一个普通中心带有横条的星系结构。
This paper summarizes soft development and technology of spreading of elliptical spiral casing based on approximate elliptical spiral casing (major and small circle casing).
主要介绍椭圆蜗壳按近似椭圆蜗壳(即大小圆蜗壳)展开的软件开发与制作工艺过程。
This paper summarizes soft development and technology of spreading of elliptical spiral casing based on approximate elliptical spiral casing (major and small circle casing).
主要介绍椭圆蜗壳按近似椭圆蜗壳(即大小圆蜗壳)展开的软件开发与制作工艺过程。
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