On 31-3-2016 4:37, BayashiPascal wrote:
> But is it water ? Given the strangeness of the whole scene (the sky, the horizon
> curvature, the colors) I like it as it is, it matches the whole atmosphere. It
> maybe some kind of frozen hydrocarbon under low pressure and gravity
> conditions... ;-)
> It reminds me this superb book of pictures from Mars :
> http://www.sebastiengirard.com/index.php?post%2F2015%2F06%2F29%2Fmars
> Some pictures looks so unreal while they are so real !!
>
>

True, but you have to realise that, whatever the planetary setting, the 
physical boundary conditions under which structures are created are the 
same. So, dunes on Mars are similar to dunes on Earth. Similarly, that 
is why it is possible to infer the wet condition of Mars in the past 
just by studying the fossilised structures outcropping near Curiosity.

Now, to come back to Pekka Aho's unnamed world, the liquid (?) surface 
looks strange either for a liquid as for a frozen one. If they are 
ripples, we can infer there is some kind of atmosphere and hence some 
wind. There is much to discover still! See? we are already building 
assumptions on the few data we have. We have to wait for the next batch 
of photographs to learn more :-)

-- 
Thomas

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