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Old 11-05-2013, 02:50 PM
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philiphart (Phil Hart)
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philiphart is offline
Join Date: Jan 2007
Location: Melbourne
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Originally Posted by RickS View Post
You might want to add Planetary Nebulae as a separate sub-category of Deep Sky?
hmm.. is a Planetary Nebula a type of emission nebula? If I add that as a sub-category of emission nebula, what are all the other emission nebula called?

And now this just confuses me more:

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