单词emission nebula
网络: 发射星云；发光星云；放射星云
So most people, you know, kind of have no idea of the difference between like, an emission nebula and a planetary nebula.
这和实际的频率和规模几乎是一样的。大多数人都分不清发射星云和环状星云之间的区别。
Messier 27 (M27) is an excellent example of a gaseous emission nebula created as a sun-like star runs out of nuclear fuel in its core.
Messier27（M27）是个气体发射星云的典型例子，它是由于类似太阳的恒星耗尽了其核心的核燃料而产生的。
Finding Barnard 163 in an image of its greater emission nebula IC 1396 can be a challenge, but it"s possible.
在Barnard163所在的更为庞大的发射星云IC1396的图片中寻找它的踪影有些难度，但还是找得到的。
Explanation: Cosmic clouds seem to form fantastic shapes in the central regions of emission nebula IC 1805.
说明：在发射星云IC1805的中心区域，宇宙云气似乎形成了奇特的形状。
At 5, 500 light years distant, Cat"s Paw is an emission nebula with a red color that originates from an abundance of ionized hydrogen atoms.
猫掌星云距离我们5,500光年，是一个发射星云，而那红光是大量被电离了的氢原子发出的。
Collisions between gas in the inner and outer regions are creating many hot blue stars and pink emission nebula.
内外层气体的碰撞产生了许多热的蓝色星体和粉红发射星云。
Other types of nebulas visible here include red emission nebula and the blue reflection nebula.
在这里还能看到其它星云，包括红色的发射星云和蓝色的反射星云。
Other types of nebula visible here include red emission nebula and the blue reflection nebula.
此处其他可见星云包括红色散发状星云和蓝色反射状星云。
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IC1396，这是一个大型发射星云，其中居住着象躯星云。
Emission nebula Sharpless 249 fills the field at the upper left.
发射星云沙普利斯249弥漫在图像的左上部。