Astronomers used the way that light from distant stars was distorted by a huge galactic cluster known as Abell 1689 to work out the amount of dark energy in the cosmos.

天文学家应用来自遥远恒星的光线的路线被一个巨大银河星系团(Abell 1689)所扭曲，由此计算出宇宙中暗能量的总量。

youdao

Of particular note are the huge streamers of cold dust that reach thousands of light-years above and below the galactic plane.

其中尤其值得一提的是大量漂浮的冰冷星尘，延伸到银河盘面上下几千光年。

youdao

The galaxies' older stellar tenants still shine on in visible light to be detected by Hubble, completing the galactic picture.

星系中较年长的恒星房客依然放射着哈勃望远镜可以探测到的可见光，这些共同组成了整个星系的画面。

youdao

Only the 318 in question, however, are close enough to the Milky Way for the predicted galactic speed limit not to have been imposed (300m light years may sound a long way, but it is a short hop on the cosmic scale).

ECONOMIST: Cosmic rays: They came from outer space | The

The researchers suggest the clusters they originated from may no longer be active, thus shedding light on the history of star activity in the galactic core.

MSN: Giant gas geysers erupting from Milky Way galaxy

Seth Shostak, an astronomer at the SETI Institute in California, speculated in 2011 that there could be 30, 000 habitable worlds within 1, 000 light-years of Earth, a minuscule distance by galactic standards.

ECONOMIST: Extra-terrestrial life