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According to the article here it is dust. However a recent article by the British Broadcasting Corporation found here [1] seems to suggest that it is in fact enshrouded in water. Can someone with more physics/astronomy experience than I update the article until it's factually accurate. Thanks. -- MarcZimmer ( talk) 00:49, 2 September 2010 (UTC) reply

Also here is a CBC article ( [2])if it has any further relevant information. -- MarcZimmer ( talk) 01:01, 2 September 2010 (UTC) reply

Both. It's heavily extincted in the optical and very bright in the infrared because of the large amount of dust. But there's also gas, which contains a huge range of molecules - one of which is water. Modest Genius ^talk 21:19, 10 May 2011 (UTC) reply