星系

The total gravity force on the star from the stars enclosed by its circular orbit can be treated as if they are concentrated at the center.

对于一个离中心为 r 的恒星来讲，来自轨道内的恒星的引力与把它们集中在星系中心的一样，来自轨道外的恒星的引力合力为零。

Most of space looks as empty as this, the glow of distant galaxies like clotted dust.

宇宙的大部分空间十分空旷，相距遥远的星系看起来就像散布的尘埃微粒。

So, too, the background galaxies behind the ring show coherent changes in their shapes due to the presence of the dense ring.

"因此，太，背景星系背后环显示，连贯的变化，在其形状，由于在场的密环"。

But I heard that our Milky way galaxy may one day collide with aneighboring galaxy.

但我听说我们的银河系也许有一天会和其周围的星系发生碰撞。

Some scientists believe they will eventually collide with the Milky Way and become part of our own galaxy.

一些科学家认为最终这两个星云将与银河相碰撞并融为我们所在这个星系的一部分。

Explore the galaxy around you, discover new solar systems, colonise new planets, and expand your empire.

探索周围的星系，发现新太阳能系统，开拓新星球，扩大自己的帝国。

A color balance was chosen so that white would be the result of averaging colors over the entire galaxy.

影像选择了色彩平衡，因此白色是整个星系平均色彩的结果。

Also known as the Needle Galaxy for its narrow profile, bright NGC 4565 is a stop on many telescopic tours of the northern sky as it lies in the faint but well-groomed constellation Coma Berenices .

由于其明亮狭窄的轮廓，NGC 4565也称为银针星系，是北部天空众多巡天望远镜的一站，它位于暗淡却美丽的伯尼斯核头座。

The article said that Herschel had developed a "new theory of cometary phenomena"; he had discovered planets in other star systems; and he had "solved or corrected nearly every leading problem of mathematical astronomy ."

文章说赫舍尔已经发展了"彗星现象的新理论"，发现了其他星系的星球，而且他已经"解决并更正了几乎每个数理天文学的主要问题"。

But these galaxies, members of Hickson Compact Group 31, are relatively nearby, only 166 million light-years away.

但这些星系，希克森紧凑集团的31名成员，是较近，只有166亿光年之远。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。