The problem is that air conditioning won’t work, since there is no air to cool the coils. Oh, well in that case, temperature won’t dissipate, either. So you can cool the coils with cool water from the winter.
Which Mazalos do they count there, ShaTzaA ChaNKaL? In what order?
As for Birchas Hachama, if you go with the geo-centric model then it doesn’t change, since the sun is said to have come into the correct position. If, however, we go the helio-centric model then the question is do we, as earthlings, still count by the sun’s relationship to Earth or from our perspective?
The thing with Birkas Hachama is than it isn’t an observed phenomenon in the first place.
Shabbos is discussed already by some Poskim, since it was Nogea the Israeli astronaut.