>I think it could be quite difficult to bring that sample 
>into a lab if that
> evaporates during digging it out :-) So currently all they 
> can do is to best
> guessing calculating with the data they have (temperature 
> of the object,
> temperature of the air and it's pressure, size of the 
> object, time needed to
> fully evaporating etc).
>
> BTW I suppose the melting and boiling point of the water 
> is a bit lower over
> there? (because of the less gravitation, therefore the 
> less atmospheric
> pressure)

Only other realistic candidate is CO2 ice. They will have 
been carefully figuring the relative responses. Atmospheric 
pressure is 1% earth's !!!
And nearly pure CO2.

Plus a little more water vapour today :-)



        Russell 

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