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1·The size of the nebula at this stage is inversely proportional to its mass.

这个阶段的星云大小与其质量成反比。《柯林斯英汉双解大词典》

2·As the nebula collapsed caused by its gravity, it spun faster and flattened into a disk.

当星云因其重力而坍缩时，它旋转得更快，并压扁成一个盘状。

3·During his sophomore year, he sold his first science-fiction story to a Scottish magazine named Nebula.

在他大二的时候，他把自己的第一个科幻故事卖给了一家名为《星云》的苏格兰杂志。

4·The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula.

难熔的内含物中的那种矿物质，也被认为是最早形成的太阳星云凝结的物质。

5·It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast.

星云的大部分都被加热到如此极端的温度似乎是不太可能的，而巨大的星云区域不可能这么快就失去热量。

6·And here you see the Crab Nebula.

这是蟹状星云。

7·The vast Cat's Paw Nebula in Scorpius.

天蝎座里巨大的猫爪星云。

8·See photos of new planetary nebula.

查看新的关于行星云团的照片。

9·We have a nebula!

我们创造了一座星云！

10·It's a nebula!

这是一座星云！

星云

1·As the nebula collapsed caused by its gravity, it spun faster and flattened into a disk.

当星云因其重力而坍缩时，它旋转得更快，并压扁成一个盘状。

2·The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula.

难熔的内含物中的那种矿物质，也被认为是最早形成的太阳星云凝结的物质。

3·During his sophomore year, he sold his first science-fiction story to a Scottish magazine named Nebula.

在他大二的时候，他把自己的第一个科幻故事卖给了一家名为《星云》的苏格兰杂志。

4·As the nebula collapsed because of its gravity, it spun faster and flattened into a disk.

随着由于重力引起的星云坍缩，它旋转得越来越快，并变成了盘状。

5·How big they get depends on their distance from the star and the density and composition of the protoplanetary nebula.

他们的形体能达到多大取决于他们离恒星的距离和原行星星云的组成。

(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