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The major issue in terraforming is , the right 'air' or brethable
mixture ( BM) gaseous ~300 K layer to be deployed, around
astronomical body providing enough gravity to retain it
indeffinitelly long in practical terms. The most important and
widelly used dilutant in BMs is N2 as it is in the earth`s
atmosphere.
See, http://www.techdiver.ws/exotic_gases.sh … .shtml#3.2
It seems only hydrogen, helium, N2 and neon are practical. All other
gases are poisonouis, narcotic, or very rare. N2 is practical for
surface ambient pressure no higher than 4-5 bars. Above that we
should dilute the O2 with other gases.
Indeed Neon is more abundant in the Universe ( via say, star mining)
than N2, so it is obvious its convenience. Neon is good up to
pressures of dozens of bars, without no narcotic or other side
effects.
For planetary terraforming N2 reserves in any stellar system are
enough - from icy bodies and gas giants amonia mining or star mining,
but if one wants to provide really huge megascale living area around
a star for baseline humans, than soon the project will run out of
natural N2 and one needs other air dilutants.
Neon is OK for high-pressure-teraform of venus-like worlds, too. It
has bigger atomic mass, hence more difficult escape.
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So, for Venus, via 'plasma-laser' mining of the surface layers of the Sun, extract 10exp18 tonnes of Neon and hawl it to Venus. It is as the helium noble gas, so it would not react chemically with the rest of the atmosphere. After the newly added by the incoming neon reaches >30 bars, and the surface temperature of Venus falls to close to room temperature, you know the CO2 lliquifies... etc. Add some 0.21 bars of O2 and you have high pressure livable environment, again.
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It seems only hydrogen, helium, N2 and neon are practical
Water cycle would not work with molecules less than 18 molecular weight.
Neon is 20 and would provide (20/18) water vapour lift, as compared to air (29/18).
The steam would not rise, to form clouds, inside helium.
Neon seems barely workable,
does Neon or Nitrogen have a catalytic effect on biochemical reactions ?
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