这种外观运动可能是由高能回旋射束扫过了星云物质后造成。
在彩虹星云内，尘埃状的星云物质围绕在大质量，炽热新星周围，这颗恒星正处于形成过程中。
但是，诞生于星云内的年轻大质量恒星最终激发了星云内到处弥漫的光和热。
如果已知星云气体的温度，则湍流的大小可直接从观测的谱线宽度得出。
从天鹅座中的明亮恒星天津四往东北方向寻找，就能找到这一小片星云状光斑！
朋友们，我再次重申：真正的民主并不逊色于牛顿的宇宙假说。
从N44内炽热的年轻亮星发出的恒星风和强辐射，激发并雕塑了炽热星云气体的暗条和流线。
在彩虹星云中，星云尘埃物质围绕着一颗炙热的年轻恒星。
从炽热恒星放射出的紫外线激发了星云，并使它发光发热。
1·They are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled.
它们的确是星云物质组成的团块，其组成物质可能与行星形成时的物质相似。
2·At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made.
曾经有人认为，这些基质颗粒可能是原始的星云尘埃，即形成陨石球粒及其内含物的物质。
3·Wu Tongchun's nebular art is expressed by the character of traditional Chinese painting.
吴同椿的星云世界是用中国画的特色来表现的。
4·The magnitude of the turbulence then follows directly from the observed line with if the nebular gas temperature is known.
如果已知星云气体的温度，则湍流的大小可直接从观测的谱线宽度得出。
5·If a protoplanet was large enough, soon enough, its gravity would pull in the nebular gas, and it would become a gas giant.
如果一个原行星足够大，形成足够快，它的重力会拉入星云的气体，它就会变成一个巨型气体行星。