Extragalactic nebula is invisible to the naked eye.
我们肉眼是看不到河外星。
A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.
粒霉菌是簇美不胜收花朵,撮星云是数天体蚁聚。
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.
当我们星云在自身重力作溃和更加快速地旋转时,星云中心形成了密集物质块。这叫做原恒星。
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The gas glows, and we call this an emission nebula.
气体会发光,我们称之为发射星。
The orion nebula is a special kind of nebula called a stellar nursery.
猎户座星是一种特殊星,叫做恒星摇篮。
Orion's sword is home to the great orion nebula, a cloud of dust, hydrogen, helium, and other gases.
猎户剑位置有猎户座星,是一种由尘埃、氢气、氦气及其他气体组成。
However, this nebula started off more or less as a big shapeless blob.
但是一开始这星或多或少更像个不成形水滴。
Everything we find on the Earth today also originated in that nebula.
我们地上一切也都来源于那片星。
This is an emission nebula located just below Orion's belt.
这是位于猎户座星带下方发射星。
It is a nebula: a star-forming region where new stars are being born.
一个正在诞生新恒星恒星形成区域。
The color of an emission nebula depends on the gas in it and how hot it is.
发射星颜色取决于其中气体和它温度。
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,有两张展示了巨大气体和尘埃——也就是星。
Some nebulae are small and dense, others can be dozens or hundreds of light years across.
一些星小而稠密,另一些星直径则可达数十或数百光年。
Because when we look deep into the nebula, we don't just see individual elements.
因为当我们凝视星时,我们看到并不是单一化学元素。
A typical density in a gas nebula is only a few thousand atoms per cubic centimeter.
气体星典型密度只有每立方厘米几千个原子。
The entire nebula is lit by four stars located in its heart, collectively called the Trapezium.
整个星由位于其中心四颗恒星照亮,统称为梯形星。
Those elements will spread out to become a nebula, a rich chemical cloud drifting through space.
这些物质最后会扩散开来,形成新星,即一大团富含化学物质团飘逸在宇宙之中。
Really, a nebula is barely more than a vacuum.
实际上,星只不过是一个真空。
At the centre of the nebula lies the remnant of the star, its core, crushed by the force of gravity.
在星中心处,这颗恒星星核依然存在着,在引力作用下它已是面目全非。
When Pan Gu broke the nebula apart, The dense and pure defined, did clearing start.
当盘古破开星, 稠密明, 清净始。
The Orion nebula is one of the wonders of the universe.
猎户座星是宇宙中奇迹之一。
He discovered that this was not, in fact, a nebula.
他发现这实际上不是星。
Nebula ads in HAI videos—so every town had a slightly different time.
HAI 视频中星广告——所以每个城镇时间都略有不同。
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