  We consider the feasibility of large-scale free-standing thin liquid film
experiment in the space environment as a new realization to study
two-dimensional hydrodynamics. We identify material and environmental criteria
necessary to avoid freezing, evaporation, chemical degradation, and spontaneous
collapse of the film. These criteria pose no obstacles to achieving films of
kilometer scale and lifetime of many months, with attainable Reynolds number up
to 10^7. However, impacts from meteoroids pose a serious threat to the film,
and require substantial shielding or unproven self-healing properties in the
film. Current theoretical and experimental studies of two-dimensional
turbulence are briefly reviewed. We also describe a specific candidate liquid
for the film.
