星系

The Cartwheel is part of a group of galaxies about 400 million light years away in the constellation Sculptor (two smaller galaxies in the group are visible below and left).

车轮星系位在玉夫座内，是离我们四百万光年远一个星系团的成员之一。

Either of two galaxies orbiting the Milky Way; visible near the south celestial pole .

围绕银河系转动的两个星系之一；在南极附近看得见。

Centaurus A is the closest active galaxy to planet Earth.

半人马座是对地球最活跃的星系。

A black hole, like theone in Centaurus A, is formed when a massive star collapses from itsown gravity.

黑洞， 像在半人马座A星系的这一个，是当一个质量大的恒星因为自己的引力而塌缩后形成。

His team has found a group of galaxy clusters moving at an extraordinary speed towards a small patch of sky between the constellations of Centaurus and Vela.

他的研究小组已经发现一组星系群竟以惊人的速度朝向半人马星座和船帆星座之间的那片天空。

It's likely that such black hole central engines generate the radio, X-ray, and gamma-ray energy radiated by Centaurus A and other active galaxies.

而半人马座 A 和其他活跃星系在电波、 X 射线和伽玛射线等波段所发出的能量

Then our galaxy and the Clouds of Magellen rotate about their centre of mass (which is 'not far' from that of our galaxy) and the motion of the "local" galactic clusters.

而我们的银河系和大麦哲伦云也会绕它们的公共质心运行，还有本星系群的运转，这些都只有极小极小的效应。

This property can be used to reveal the distance to a cepheid's parent galaxy, because the star's period reveals its intrinsic brightness.

这一特性可以用来测算出一造父变星与其源星系之间的距离，因为变星的周期能显示出其内在亮度。

This view of NGC 3370 was obtained by the Hubble Space Telescope using the Advanced Camera for surveys and is sharp enough to identify individual Cepheid variable stars in the galaxy.

星系NGC 3370的中心分布着轮廓鲜明的尘埃带和一个不太容易辨认的核。

Cepheid variable stars are used to establish extragalactic distances.

这张清晰度非常高的图片是哈勃太空望远镜利用高级测量摄像机拍摄，我们通过它甚至能看到该星系里的单个造父变星。

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。