The murkiness of the Dark River is caused by absorption of background starlight by dust, although the nebula contains mostly hydrogen and molecular gas.
黑暗之河的阴暗色是由于尘埃吸收背景的星光而产生的，尽管星云含有大部分氢和分子气体。
Explanation: One of the most identifiable nebulae in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud.
解释：天空中最容易辨认的星云之一，猎户座的马头星云，是巨大而黑暗的分子云的一部分。
It is visible as the dark indentation to the red emission nebula seen above and to the right of center in the above photograph.
它的特征是在上图中一片红色的发射云气的黑色部分，就在上面照片中央靠右的位置。
Connecting the Pipe Nebula to the bright star Antares is a flowing dark cloud nicknamed the Dark River.
连接管状星云到明亮之星antares的是一个昵称为黑暗之河的流动暗色云状物。
The third, NGC 6559, is left of M8, separated from the the larger nebula by a dark dust lane.
第三个星云为NGC 6559，位在M8的左方，二者被一道尘埃带隔开。
A dark nebula, one of the nearest to Earth, that appears in the southern Milky Way.
煤袋最接近地球的黑色星云之一，见于银河系南部
Above Antares, a number of dark nebula can been seen silhouetted against the starry background.
第三个球状星团M80可见于蛇夫座Rho的右侧。
A similar dark nebula in the Northern Hemisphere near the constellation Cygnus.
天鹅座北半球靠近拉塞尔达和利拉的星座，包括天津四星
In fact, clumps of dust and molecular gascollapsingto form stars may well lurk within the dark nebula, a structure that spans almost 40 light-years across thegorgeous telescopic view.
在这幅壮丽的望远镜星野里，这座黑塔延伸将近四十光年，而在这团暗星云之内，可能藏着正在塌缩成恒星的尘埃和云气团块。
Below Alnitak is the Flame Nebula, with clouds of bright emission and dramatic dark dust lanes.
在参宿一下方是火焰星云，由明亮的发射星云以及生动的黑暗尘埃带组成。
Left of Alnitak is theFlame Nebula, with clouds of bright emission and dramatic dark dust lanes.
首先注意到的是腰带左下方那颗名为参宿一的星星，它照亮了反射星云 M78。
Immediately to Alnitak's left is the Flame Nebula, with clouds of bright emission and dramatic dark dust lanes.
参宿一是猎户腰带中最东边的恒星，并且在马头星云上方是最明亮的。
The island-like clumps of dark clouds scattered across the nebula are nodules of dust and gas that are resisting being eaten away by photoionization.
散布在星云中孤岛样的块状冷云是正在经受光电离吞噬的气体和尘埃节。
A deep exposure shows everything from dark nebula to star clusters, all imbedded in an extended patch of gaseous wisps in the greater Orion Molecular Cloud Complex.
从深空的影像中显示，在猎户座分子云复合体之中，延展的云气丝藏了无数的黑暗星云到星团的补丁。
They were near a dark-matter nebula.
他们靠近了一个暗物质星云。
When we encountered a dark-matter nebula.
我们遇上了一个暗物质星云。
Below the frame center and just to the right of Alnitak lies the Horsehead Nebula, a dark indentation of dense dust that has perhaps the most recognized nebular shapes on the sky.
画面中央偏下，也就是位在参宿一右方的马头星云，由致密的黑暗尘埃组成，应当是天空中最被认可的形状。
To the right of S Mon is a dark pointy featured called the Cone nebula, a nebula likely shaped by winds flowing out a massive star obscured by dust.
对于S的周一权是一项功能叫做黑尖锥形星云，可能是由水流出一大质量恒星形成的尘风掩盖一星云。
Explanation: By starlight this eerie visage shines in the dark, a crooked profile evoking its popular name, the Witch Head Nebula.
女巫头星云得名于它那在黑暗中时隐时现的阴森的面容，它那畸变得外形让它得到了这么一个外号。
Moving into the surrounding nebula, this torrent of radiation sculpted the tall, dark stalks of dense gas, which are embedded in the walls of the nebula.
进入周围的星云之中后，放射物的急流形成了密集气体高大黑暗的茎状物，它嵌入了星云之中。