星系

She's committed 30 felonies in 1 2 star systems.

她打算在十二个星系里作案三十次

Images from NASA's Hubble Space Telescope show that star formation in the galaxy began fizzling out in its outskirts about 500 million years ago as some of the gas was stripped away and the rest collapsed toward the center.

这幅 NASA 哈勃太空望远镜所获得的图像显示出，5 亿年前星系的恒星形成活动在其外缘区域开始走向末路。当时很多气体被清除出去而余下来的则向中心塌陷。

Images from NASA's Hubble Space Telescope show that star formation in the galaxy began fizzling out in its outskirts as some of the gas was stripped away and the rest collapsed toward the center.

根据哈勃太空望远镜图像，随着气体耗尽，星系中外缘的恒星诞生在5亿年前就逐渐熄灭了，并且迅速向中心传导。

Images from NASA's Hubble Space Telescope show that star formation in the galaxy began fizzling out in its outskirts about 500 million years ago as some of the gas was stripped away and the rest collapsed toward the center.

根据哈勃太空望远镜图像，随着气体耗尽，星系中外缘的恒星诞生在5亿年前就逐渐熄灭了，并且迅速向中心传导。

A similar effect flattens the debris disks around stars and the gaseous disks of spiral galaxies.

类似的效应也会出现在恒星周围的残馀盘，以及螺旋星系周围的气体圆盘上。

Each cloud fluoresces because of the strong ultraviolet light emitted from the embedded young stars, which have formed within them due to gravitational collapse of the gas.

星系深处年轻的恒星发出的强烈的紫外线照射到云上，使得这些云发光。这些年轻的恒星是由于气体在万有引力的作用下坍缩而产生的。

"There's no freshening of the gas in the cluster galaxies themselves," Martini said.

马蒂尼说：&星系团内的星系本身也没有新气体产生。&

The collision also is funneling gas into the galaxy's center and is feeding a supermassive black hole.

这次碰撞把气体送进星系中心，为巨型黑洞提供了燃料。

"It seems to be telling us there is a threshold when galaxies form," he says.

&这好像是在告诉我们，当星系形成的时候有一个最低质量限度，&他说。

Why don't we just look at galaxies and see how they evolve?

我们为什么不去观察星系看看他们是怎样发展的呢？

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。