QUOTE (Gsnorgathon @ Mar 21 2008, 09:28 PM)
Maybe they're not hanging together. Perhaps they're continually brought up from below?
That's as good an explanation of any that I've heard lately.
Might there be a cometary plume of material streaming away from the planet, and the water and methane re-combining only after their constituents have been stripped away?
Nah, UV light from the parent star will prevent any molecules from forming.