Explanation The center of the Lagoon Nebula is a whirlwind of spectacular star formation.
说明礁湖星云中心上演着波澜壮阔的恒星形成大篇章。

Our own sun will blossom into a planetary nebula when it dies in about five billion years.
大约50亿年后，我们的太阳死去时，也会变成行星状星云。

Instead the nebula glows with light from hydrogen gas being charged by the stars'radiation.
星云的光辉则是来自在恒星强烈辐射作用下带电的氢气。

On the far right, the North America Nebula is visible just under the very bright star Deneb.
影像右方, 明亮的天津四下边可以看到北美洲星云。

But a few grains have survived from the primitive nebula that the solar system condensed from.
但是一些颗粒是来自于凝成太阳系的原始星云。

The nebula was the first astronomical object identified with a historical supernova explosion.
此星云是历史上首次被定为超新星爆炸产物的天文物体。

Right to the crux is the Eta Carina Nebula， one of the most beautiful nebula in the night sky.
南十字右方为船底座的海山二星云，也是十分壮观的天体。

The top of the Keyhole Nebula, the most prominent feature embedded inside Carina, is on the left.
深植于船底座中最显著的结构锁眼星云的顶部处在左边。

Star formation continues in the Lagoon Nebula as witnessed by the many globules that exist there.
所以我们可以目睹礁湖星云中许多恒星的的形成。

The Rosette Nebula itself, and its massive cluster of stars, is located to the right of the picture.
罗赛特星云自身以及它得密集得恒星群位于图像右侧。

In brilliant blue, this is the pulsar wind nebula of the Crab Nebula in the constellation of Taurus.
这个绚丽的蓝色是金牛座星系中蟹状星云的脉冲风星云。

The general shape of the average nebula is that of a thin circular disk somewhat thick in the center.
星云最常见的形状是中间较厚边缘较薄的圆盘。

The Red Rectangle nebula lies about 2, 300 light years away towards the constellation of the Unicorn.
红色矩形星云2300光年远, 在麒麟座。

The more intricate the design of the nebula, the better chance an individual has of attracting a mate.
越是复杂的星云, 就代表著有更好的机会吸引伴侣。

The masterpiece shows the Orion nebula in an explosion of infrared, ultraviolet, and visiblelight colors.
该杰作展示了猎户座星云在红外, 外和可见光的色彩爆发。

The Pipe Nebula is part of the Ophiuchus dark cloud complex located at a distance of about 450 lightyears.
管星云是复杂的蛇夫座星云综合体的一部分，距离约450光年。

Today, the Crab Nebula is still expanding and it will eventually dissolve in the interstellar gas cloud nearby.
蟹状星云仍然在膨胀最终会溶入星际物质而消散。

As we have discussed in the last chapter, the density of a nebula is very low. And it contains mostly hydrogen.
如上一章所述, 这些星际云密度很低, 成分主要是氢。

This color view of the Cocoon Nebula traces remarkably subtle features within and surrounding the dusty stellar nursery.
整个影像包含茧状星云以及附近的恒星孕育场。