“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	selective pulse selective radiation selective radiation process selective radiator selective reagent selective reduction selective reflection Selective sampling selective sampling selective scattering selective scattering coefficient selective serotonin reuptake inhibitor Selective Service Act of 1917 selective strain of German mirror common carp selective sweep selective tendering Selective toluene disproportionation process selective transarterial infusion chemotherapy selective transfer selective transmission selective vector Selectivism selectivity selectivity coefficient selectivity control system

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