星系

At least some elliptical galaxies, as well as the bulges and halos of spiral galaxies, may have arisen from such collisions.

至少螺旋星系的核球与晕，以及某些椭圆星系，可能是由此种碰撞产生的。

They found millions and millions of galaxies, each of which contained billions and billions of stars.

他们发现了数百万的星系，而每一星系有着数以亿计的恒星。

The nucleus of NGC 4038 is obscured by dust which dims and reddens starlight by scattering the shorter, bluer wavelengths.

显示出2个核心附近的尘埃、气体都成漩涡状向星系中心流动（那是当然的，哪个星系不是这样？

The outer rim of a small, foreground galaxy is silhouetted in front of a larger background galaxy.

带扩展环的小型前景星系，在巨大的背景星系前呈现为剪影状。

Computer simulations of galaxy cluster collisions show that when two clusters smash together, the dark matter falls to the center of the combined cluster and sloshes back out.

由计算机模拟的星系碰撞展示了当两个星系团粉碎在一起的时候，暗物质就会落向星系的中心并逐渐克服引力的作用，向外移动回来。

Supernovae also come from larger, more developed galaxies than do the gamma-ray bursts.

超新星也来自于更大更成熟的星系的星系。

We estimate the fraction of absorption lines arising from galaxy disks, which is only about 10 per cent.

星系盘的贡献之占大约10％，大部分强MgⅡ吸收线是由星系晕产生的。

If big galaxies indeed possess such large numbers of DM satellites and they possess gas, these satellites may play an important role for strong Lyman α absorption lines.

模型预言的由星系气体晕与卫星星系产生的强赖曼α吸收线系统分别能解释哈勃空间望远镜类星体吸收线重点项目的结果的约20％及40％。

Also known as Messier 51a, M51a, or NGC 5194, the Whirlpool Galaxy is an interacting grand-design spiral galaxy located at a distance of approximately 23 million light-years in the constellation Canes Venatici.

漩涡状星系又被称为&梅赛耶51a&，&M51a&或&NGC 5194&，与的地球距离为2300万光年，位于北天的猎犬座，是一个庞大的，与它的伴星系共存的螺旋状星系。

NGC 4945 appears cigar-shaped from our perspective on Earth, but the galaxy is actually a disc many times wider than it is thick, with bands of stars and glowing gas spiraling around its center.

从地球的角度来看，星系 NGC4945就象一根雪茄，但实际上该星系是圆盘状的，其直径是厚度的许多倍。排列成条状的恒星以及炽热的气体在中心周围盘旋。

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。