星系

Light, which normally and famously travels in straight lines, thus appears to follow a curved path when it passes near a heavy thing such as a galaxy.

光，这种毫无疑问沿直线行进的东西也会在经过一个如星系的大质量物体时被弯折而走一条弯曲路线。

How much of the mass is accreted before, during, and after galaxy formation remains to be seen.

黑洞在星系形成之前、之中、之后增长了多少质量仍待研究。

Instead, bulges with unusually high velocity dispersions are observed to be unusually compact.

相反，具有异常高的分离速度的星系结构却很紧密。

I categorized 10 as I was writing this article.

在我写这篇文章的时候我已经分类了10个星系了。

And now there's a new way you can contribute: classifying galaxies.

现在，你可以有了一种新的贡献方式：分类星系。

It must be cleansed from the galaxy if we are to survive.

如果我们想生存下去，它必须在所有星系中被清除。

The latest data from Chandra and Spitzer show that IC 4970, the small galaxy at the top of the image, contains an AGN, but one that is heavily cocooned in gas and dust.

来自钱德拉和斯皮策的最新数据显示IC4970，即图像中上方的小星系，包含一个AGN，但是其被气体和尘埃包围着。

That's because this image of NGC 3256 shows two galaxies that are slowly colliding.

这是因为这个形象ngc 3256表明两个星系正在慢慢地碰撞。

Again, in 2003, we sighted another galaxy colliding with the Milky Way, this one even closer.

又一次，就在2003年，我们发现了银河中的另一个星系，这一个就离我们更近了。

So how could we have missed two entire galaxies that are colliding with us?

那么，为什么我们会漏掉离我们如此近的两个星系呢？

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。