The color gradient of spiral galaxy freezes its fossil information of the star formation history along the disk and therefore provides a strong constraint on the models of disk formation and evolution.
旋涡星系的颜色梯度反映了其星族构成沿径向的分布,包含了星系恒星形成历史的信息。
Inclination-Dependent Luminosity Function of Spiral Galaxies and the Statistic Analysis for Dust Extinction;
旋涡星系光度函数与倾角的关系及尘埃消光的统计分析
The formation and evolution of disks are important for the formation and evolution of spiral galaxies, for disks are important components of the galaxies and the most baryons are in disks.
在旋涡星系形成和演化的过程中，星系盘的形成和演化是关键，因为盘是星系的主要成份，大部分的重子物质都包含在星系的盘中。
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 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
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。
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。
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。
Inclination-Dependent Luminosity Function of Spiral Galaxies and the Statistic Analysis for Dust Extinction;
旋涡星系光度函数与倾角的关系及尘埃消光的统计分析
The mystery arises when one considers how a spiral galaxy rotates.
当人们考虑旋涡星系是如何转动的时候难题就来了。
The story begins with a local eddy in the swirling gas and dust of the primordial galaxy.
话题要从原始星系的旋涡气体和尘埃形成的一个局部涡流说起。
The spiral nebulae are impressive objects.
旋涡星云是迷人的天体。
This flat circular disk is our own Galaxy, the Milky Way, with its spiral structure.
这个圆盘就是我们的星系，银河系，带着旋涡的结构。
The Research for New Scroll Profile and Dynamics of Scroll Compressor;
涡旋压缩机涡旋新型线及系统动力学研究
Clouds of stars and glowing gas, with patches of darkening dust, mark the slow-changing spiral patterns of the Galaxy disk.
点缀着暗淡尘埃的团团恒星和发光星云，标记着银河系缓慢变化的旋涡外形。
A vortex, as of a whirlwind or whirlpool.
涡流，如旋风或旋涡的
EDDY STRUCTURE IN SOUTH CHINA SEA FROM SATELLITE?TRACKED SURFACE DRIFTING BUOYS AND SATELLITE?REMOTE SENSING SEA SURFACE HEIGHT
卫星跟踪浮标和卫星遥感海面高度中的南海涡旋结构
Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness.
旋涡星云因为非常暗，难以得到它们的清晰的光谱。
THE INFLUENCE OF EDDY VISCOSITY ON THE SUBTROPICAL PLANETARY-SCALE CIRCULATION IN SUMMER
涡旋粘性对于夏季副热带准定常行星尺度环流的影响
Vortex injection provides a form of swirl or cyclone combustion for a rocket engine similar to systems often employed in industrial furnaces.
涡流喷射在火箭发动机中产生一种涡流或旋涡形式的燃烧，与工业炉中常采用的系统相似。
Field test of operating characteristics of DVM systems in winter
数码涡旋多联式空调系统冬季运行特性实测