The result was keep. Talk page discussion revealed that while all nebula are interstellar clouds, not all interstellar clouds are nebula, and thus a merge would be incorrect. --NickPenguin(contribs) 15:36, 30 March 2009 (UTC)[reply]
The two articles seem to discuss the same basic phenomenon, although this merge may be difficult since some but not necessarily all interstellar clouds are nebula. --NickPenguin(contribs) 04:25, 25 March 2009 (UTC)[reply]