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。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。