There
was an idea some time back that if we ever get to the moon that we
could be using "open-air" valves (tubes) in the vacuum there for high
powered devices - with the benefit that goes with the better radiation
resistance that goes with valve technology.
While the vacuum in space is pretty good, space itself is too
dirty. Microscopic space junk, basically.
William Donzelli
aw288(a)osfn.org
