| 单词 | reflection nebula | 
| 释义 | > as lemmasreflection nebula   reflection nebula  n. Astronomy a nebula which is visible only by virtue of the starlight which it reflects; cf. emission nebula n. at emission n. Compounds. ΘΚΠ the world > the universe > constellation > nebula > 			[noun]		 > planetary nebula dumb-bell nebula184. crab1868 planetary1903 reflection nebula1936 1936    Astrophysical Jrnl. 84 219 		(heading)	  				Reflection nebulae. 1974    Sci. Amer. Oct. 34/3  				These reflection nebulas are useful for studying the properties of the interstellar dust grains. 2004    M. Inglis Astron. of Milky Way I. iv. 180  				Comprising both an emission and a reflection nebula is NGC 1931. < as lemmas  | 
	
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