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1·L Reflection nebulae have no light of their own.

l还有一种星云叫反射星云，它们本身并不发光。

2·The Nebulae is based on chips from Intel and Nvidia.

现在的曙光星云是利用英特尔和Nvidia的芯片建立的。

3·Nowadays, many nebulae are known to be galaxies instead.

我们现在已经熟知的许多星系过去也被称为星云。

4·These nebulae can be seen with binoculars from a dark location.

你可以在较暗的地区用双筒望远镜看到这两个星云。

5·L the Ring nebula in Lyra is the best-known of the planetary nebulae.

l天琴座中的环状星云是最著名的行星状星云。

6·Planetary nebulae fade away gradually over tens of thousands of years.

行星状星云在数万年间逐渐衰老。

7·Stars that form planetary nebulae typically live for billions of years.

具有代表性的是，构成行星状星云的恒星已经存活了十亿年。

8·Hot stars embedded in the dust can be seen as bluish reflection nebulae.

热恒星嵌在尘埃中即表现为蓝色的反射星云。

9·Brightclusters and nebulae abound in the northern constellation of Auriga.

御夫座北部有大量明亮的星团和星云。

10·L Dark nebulae not only have no light of their won, they also soak up all light.

l暗星云不仅本身不发光，而且会吸收所有的光线。

星云

1·Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a compact red emission region, and streamers of obscuring dust against a backdrop of stars.

这反映了附近恒星的光热，2170星系是由其他蓝色反射星云，紧凑的红色发光区域，以及在模糊的背景下对恒星尘埃的飘带组成。

2·Astronomical images of the well-known Pleiades often show the cluster's alluring blue reflection nebulae, but they are washed-out here in the bright moonlight.

著名的昴星团在天文照片中常常以迷人的蓝色反射星云夺人眼目，但在这张照片上，它们因明亮的月光而失色。

3·The universe is an unimaginably vast space filled with planets, stars, systems, nebulae, gas, dust — and it's impossible for us to ever explore it all.

宇宙的浩瀚无涯超出想象，无数的恒星、行星、星系、星云、气体、尘埃充斥其间，让我们无法一一探遍每一个角落。

4·Basic organic (life) chemicals such as amino acids have been detected in nebulae and meteorites (see meteors).

构成生命组织的基本化学物如氨基酸，在星云和陨石中也被发现。

5·Brightclusters and nebulae abound in the northern constellation of Auriga.

御夫座北部有大量明亮的星团和星云。

(1)horsehead nebula[天文]马头星云

(1)orion nebula猎户座星云；猎户星云

(1)planetary nebula行星状星云

(1)reflection nebula反射星云

(1)emission nebula发射星云