Therefore,our Milky Way should be morphologically catalogued as a barred spiral galaxy instead of a normal spiral one.
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。
The observations and studies of the OH megamasers associated with AGN and starburst galaxies are the very efficient tools to investigate characteristics of their central sources an.
对河外星系OH超脉泽的观测和研究,是探测和研究其所成协的活动星系核、星暴星系的中央源和拱核盘的有效工具。
Most people think of our own galaxy, the Milky Way, as a pure spiral, but astronomers now know it is actually a barred spiral.
大多数的人认为我们自身的银河系是个单纯的螺旋星系，但天文学家现在知道它其实是个棒旋星系。
The Color-Magnitude Relation of Late-Type Galaxies and their Disks
晚型旋涡星系及其盘的颜色星等关系
Bars are hard to recognize in distant galaxies.
遥远星系中，比较难辨识出棒状结构。
Spiral galaxies are considered to be gravitationally bound configurations of stars.
旋涡星系被认为是由恒星组成的引力束缚系统。
The stars of the galaxy must revolve about its center if the galaxy is not to gradually collapse.
如果星系不致于逐渐坍陷的话，星系中的恒星必须绕其中心旋转。
The galaxy spins much like the cream on the surface of a cup of coffee.
星系旋转于咖啡表面的奶油很相似。
Research on Satellite Attitude Control System Based on Robust Fault-Tolerant Control;
卫星姿态控制系统的鲁棒容错控制研究
Robust Non-fragile H_∞ Control for Coarse Pointing System of Inter-satellite Optical Communication Terminals
星间光通信终端粗瞄系统鲁棒非脆弱H_∞控制
During this time, the bar prevents fresh gas from entering the central part of the galaxy.
在这段时间里，星棒阻止了新鲜气体进入星系的中心地带。
Smaller groups of stars called globular clusters often surround spiral galaxies.
称作球状星团的小型恒星团体经常环绕在旋涡星系周围。
The gas accumulates in the outer region and, after the bar self-destructs, pours in and rejuvenates the galaxy.
气体因而蓄积在星系外缘，在星棒自我毁灭后才大量涌入，并使星系重生。
The other is that ellipticals are relative latecomers, having been produced as a result of the merging of spiral galaxies.
另一种则是：椭圆星系是较晚才出现的，它们是螺旋星系合并的后果。
someone who twirls a baton.
旋转一个指挥棒的人。
But almost all spiral galaxies are much older than2 billion years.
但是几乎所有旋涡星系的年龄都超过了20亿年。
There is a curious feature in the spectra of spiral galaxies.
在旋涡星系的光谱中有一种奇妙的特征。
Bulk Viscosity of QM and Limiting Rotation for Pulsars;
夸克物质体粘滞系数与脉冲星的极限旋转
Collisions also can transform the shape of galaxies involved; specifically, the merger of two spiral galaxies may produce a single elliptical galaxy.
碰撞也会改变星系的外形，特别是当两螺旋星系融合后可能会产生单一的椭圆星系。
a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center.
有螺旋形构造的星系；包括年纪较小的恒星在中心从年纪较大的中螺旋出去的臂状物。