The origin of the dust in elliptical galaxies could be internal from stellar mass loss or external from merger.
该文总结了近年来椭圆星系中尘埃起源研究中的一些关键问题,包括尘埃大小的分布及其组成、椭圆星系恒星质量损失速率、尘埃的两种加热机制(恒星辐射加热和电子-尘埃碰撞加热),以及由此导致的尘埃温度分布;尘埃的总质量估算;由热离子导致的尘埃破坏速率,以及与此相关联的椭圆星系热气体分布,等等。
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。
Recently astronomers have discovered these intermediateage globular clusters in several elliptical galaxies.
最近，天文学家已在数个椭圆星系里发现了这类中龄的球状星团。
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。
The light from an elliptical galaxy is brightest in the center and gradually becomes fainter toward its outer regions.
从椭圆星系发出的光在中心部分最亮越靠近边缘越暗淡。
In the specific model we developed, elliptical galaxies have roughly equal numbers of each type.
在我们所发展出的模型里，这两类星团在椭圆星系中的数量大致上是差不多的。
ONE WAY TO DEMONSTRATE a link would be to identify two populations of globular clusters in old elliptical galaxies.
要证明两者彼此相关，其中一个方式，就是在古老的椭圆星系中，同时辨识出这两类球状星团。
Most of these systems show clear evidence for two distinct populations of globular clusters, one blue and one red.
这类椭圆星系大多清楚地显现出一蓝一红、种截然不同的球状星团族群。
Study of Satellite Communication ECC Arithmetic Security in Emergency Command System;
应急系统中卫星通信椭圆曲线安全算法的研究
Note the large" oval" of the galaxy, with the name" Andromeda Galaxy" below it.
注意这个星系的巨大椭圆轮廓，下面标有“仙女座大星系”。
Dynamics Performance Analysis, Parameters Optimization and Proof for Transplanting Mechanism with Planetary Elliptic Gears;
椭圆齿轮行星系分插机构的动力性能分析、参数优化及实验验证
the acceleration toward the center that holds a satellite in elliptical orbit.
在卫星椭圆轨道上面向中心的加速度。
Pluto has an elliptic orbit.
冥王星的轨道是椭圆形的。
When stars' ellipses rotate at widely different speeds, the galaxy has no wave structure.
当恒星画出的椭圆彼此间绕转速率差异甚大时，星系不会出现波动结构。
If the satellite has an elliptical orbit, the result is a spiral wave, a miniature version of the pinwheel pattern of our galaxy.
如果卫星的轨道是椭圆的，就会产生螺旋波，就像是银河系纸风车形状的缩影。
Resembling an ellipse in shape;elliptical.
椭圆形的形状类似椭圆的，椭圆的
Newton proved mathematically that the path of a plant must be an ellipse
牛顿用数学证明了行星的轨道必定是椭圆形的。
The orbits of the planets are ellipses with the sun at one focus.
行星的轨道是以太阳作为焦点之一的椭圆。
Application of Ellipse Fitting Methods to the Edge of Saturn s Ring;
椭圆拟合方法及其应用于土星光环边缘
