emission nebula

基本解释

Finding Barnard 163 in an image of its greater emission nebula IC 1396 can be a challenge, but it's possible.
在 Barnard 163 所在的更为庞大的发射星云 IC 1396 的图片中寻找它的踪影有些难度，但还是找得到的。
The red glow in the background results from IC 1396, a large emission nebula that houses the Elephant's Trunk Nebula.
背景的红色光芒来自于 IC 1396，这是一个大型发射星云，其中居住着象躯星云。
The emission nebula is found near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4, 000 light-years away.
这个发射星云在南天星座天坛座另一个巨大的暗分子云的边缘被发现，离我们约4000光年。