Extragalactic nebula is invisible to the naked eye.
眼看不到河外星系的。
You can see nebulae in the clear summer sky.
在晴朗的夏夜可以看到天上的星云。
A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.
一粒霉菌一簇美不胜收的花朵，一撮星云无数天体的蚁聚。
The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.
在蓝色星云附近，微小但迷人的微黄色弧状可见物标出了年轻可见恒星南冕座R星的位。
As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.
的星云在自身重力作下崩溃和更加快速地旋转时，星云中心形成了密集的物质块。这叫做原恒星。
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However, this nebula started off more or less as a big shapeless blob.
但是一开始这星云或多或个不成形的水滴。
The orion nebula is a special kind of nebula called a stellar nursery.
猎户座星云是一种特殊星云，叫做恒星摇篮。
He saw clusters of stars, brightly colored nebulas, even entire galaxies!
他看到了无数星团，明亮的星云，甚至还看到了整个银河！
This object is what we call a planetary nebula.
这个物体就是我们所说的行星状星云。
Everything we find on the Earth today also originated in that nebula.
我们地球上的一切也来源于那片星云。
It is a nebula: a star-forming region where new stars are being born.
一个正在诞生新恒星的恒星形成区域。
The most famous is the Crab nebula, from a star we saw blow up in the year 1054.
其中最著名的是蟹状星云，它来自于我们在1054年看到的恒星爆炸。
Among the other four images were two that showed huge clouds of gas and dust – called nebulas.
在其他四张照片中，有两张展示了巨大的气体和尘埃云——也就是星云。
Orion's sword is home to the great orion nebula, a cloud of dust, hydrogen, helium, and other gases.
猎户剑的位置有猎户座星云，是一种由尘埃、氢气、氦气及其他气体组成的云。
Because when we look deep into the nebula, we don't just see individual elements.
因为当我们凝视星云时，我们看到的并不是单一的化元素。
That's a very common shape for planetary nebulae.
这是行星状星云很常见的形状。
Planetary nebulae can be a bit tough to observe: most are small and faint.
它们大多数很小而且很暗。
So planetary nebulae really may owe their existence to planets!
所以行星状星云的存在可能真的要归功于行星！
When that happens, you get that idealized soap bubble nebula.
如此一来，就会得到理想的肥皂泡星云。
Galaxies, nebulae and star clusters have been seen like never before.
星系、星云和星团以前所未有的方式出现。
Are they all nebulae, asteroids, Ford car models or Greek gods?
它们是星云、小行星、福特汽车模型还是希腊众神？
You can watch the full version of all these videos at nebula.
你可以在Nebula上观看这些视频的完整版本。
All you need to do is go to nebula.
你只需访问nebula.tv即可。
Nebula ads in HAI videos—so every town had a slightly different time.
HAI 视频中的星云广告——所以每个城镇的时间略有不同。
And that'll be really cool because that'll create this like big nebula.
那将会非常酷，因为那样会形成一个巨大的星云。
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划词翻译
详细解释
眼
看不到河外星系的。
课堂 课堂 
多
。
个不成形的水滴。
来源于那片
元素。
是
