"That makes it poor reference material, you're not sure what you are citing."--
that would probably be why

1. Wikipedia encourages citations for all statements of fact.
2. most schools teach that you shouldn't cite encyclopedias in general, but use them to find other closer-to-primary references.

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Todd (Bowie, MD, US, North America, Earth, Sol System, Vega region, Local Bubble, Orion arm, Milky Way Galaxy, Local Group, Virgo A Cluster, Virgo supercluster, the universe in which spock is clean shaven)

Quidquid latine dictum sit, altum sonatur.

personal page: http://blog.astrosketches.info