20 世纪初, 依据分辨出的造父变星, 哈勃测量了地球至 仙女座星系的距离, 平息了对于所谓螺旋星云(Spiral Nebula)是银河系内结构还是河外结构的辩论, 明确 了它们是在银河系以外并与银河系类似的星系结 构 [2] .
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... spiral galaxy 旋涡星系; 旋涡星系 spiral nebula 旋涡星云; 旋涡星云 spiral pattern 螺纹; 螺纹 ...
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solar spiral nebula 太阳旋涡星云
spiral nebula detail 旋涡星云
a spiral nebula 旋涡星云
spiral galaxy spiral nebula 螺旋星云
spiral l nebula 螺旋星云
同义词： spiral galaxy
以上来源于: WordNet
Perhaps the original spiral nebula, M51 is a large galaxy, over 60, 000 light-years across, with a readily apparent spiral structure.
也许旋涡星系m 51原本是一个巨大的星系，直径超过6万光年，有显尔易见的旋涡结构。
This NASA image obtained shows the 51st entry in Charles Messier's catalogue, perhaps the original spiral nebula, also catalogued as NGC 5194.
在查尔斯·梅西方尔目录第51条列出的美国宇航局获得的图像表现的也许是最初的螺旋星云，它也被编为新总表（NGC）5194。
When you look up into the heavens with a telescope, you see many nebulae whelloch are like, or approximately like, the perfectly balanced spiral nebula whelloch you see edgewise in Fig. 23.
当你用千里镜不雅测天空，你瞥见很多与图示23中边沿朝前的完善平衡的螺旋星云相仿或大致相是的星云。
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