气体星云

电离气体星云的密度诊断

A Reexamination of Electron Density Diagnostics for Ionized Gaseous Nebulae

元素氢占气体星云物质的百分之九十。

The element hydrogen comprises 90 % of the matter in gaseous nebulae .

有些气体星云似乎被极其巨大的分子云完全包围。

Some nebulae appear to be completely engulfed by exceedingly large molecular clouds .

精确的热动平衡永远不会在气体星云的一个微观范围内达到。

Precise thermodynamic equilibrium may never be achieved in a microscopic realm within gaseous nebulae .

行星状星云是一类孤立的气体星云，具有相当程度的双侧对称性。

Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry .

这种环绕着年轻星的动荡且常常是壮观的星际区域，叫做气体星云。

Such tumultuous , often visually spectacular , interstellar regions surrounding youthful stars are known as gaseous nebulae .

壮丽的气体柱正被星云中新生的炽热恒星发出的紫外线所侵蚀。

The great gas pillar is being eroded by the ultraviolet radiation from the hottest newborn stars in the nebula .

传统的理论认为它一定像一颗恒星那样是有一团星际气体形成的压缩星云组成的。

Conventional theory suggests that it must have formed like a star , from a collapsing cloud of interstellar gas .

星由很热的，密集的气体组成的，星云里的气体是冷的和弥散的。

Whie stars are made of very hot , dense gas , the gas in nebulae is cool and spread out .