“Orion nebula”的概念、定义、翻译、参考文献-科学参考

单词	Orion nebula
释义	Orion nebula Encyclopedia 理学发射星云释 Orion nebula猎户座大星云位于猎户座的发射星云。用肉眼观察，猎户座中构成“宝剑”的有三颗星，中间一颗是较模糊的亮斑，它不是单颗星，而是一个星云，即猎户座大星云（星表编号为M42和NGC1976）。
随便看	Morris-Lecar neuron model Morris Lurie morris water maze Morse Morse code Morse-Conley index Morse crater Morse function Morse index Morse index theorem Morse inequality Morse knot Morse lemma Morse number Morse potential Morse-Rosen differential equation Morse Sard theorem Morse-Sard theorem Morse Smale diffeomorphism Morse-Smale diffeomorphism Morse-Smale dynamical system Morse-Smale flow Morse Smale system Morse-Smale system Morse Smale vector field

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