旋涡星云
- 网络a spiral nebula;spiral nebulae;helix nebula
旋涡星云-
旋涡星云是迷人的天体。
The spiral nebulae are impressive objects .
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旋涡星云因为非常暗，难以得到它们的清晰的光谱。
Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness .
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天体中，从众多的硕大的旋涡状星云，到坠落于地球上的微小的陨砂、陨尘，普遍存在着螺旋状的结构形态。
There are commonly the helical structures in the celestial body from many gigantic whirl nebulae to small meteoric stone and dust falling to the Earth .