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Date: Tue, 30 Mar 93 05:56:43
From: Space Digest maintainer <digests@isu.isunet.edu>
Reply-To: Space-request@isu.isunet.edu
Subject: Space Digest V16 #390
To: Space Digest Readers
Precedence: bulk
Space Digest Tue, 30 Mar 93 Volume 16 : Issue 390
Today's Topics:
Why is Venus so bad?
Why is Venus so hot?
Welcome to the Space Digest!! Please send your messages to
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(THENET), or space-REQUEST@isu.isunet.edu (Internet).
----------------------------------------------------------------------
Date: Tue, 30 Mar 1993 05:54:03 GMT
From: Frank Crary <fcrary@ucsu.Colorado.EDU>
Subject: Why is Venus so bad?
Newsgroups: sci.space,rec.scuba
In article <1993Mar30.013850.19207@herboid.uucp> adb@herboid.uucp (Anthony DeBoer) writes:
>>Nowhere near. Canadian scuba divers use Molson's law to predict
>>nitrogen narcosis: each 33 feet of water (1 atm) is the equivalent of
>>ingesting one Molson (a brand of beer)...
>>And it _may_ be possible to live at 100 atms ambient, provided the
>>atmosphere is very, very inert and contains only very small partial
>>pressures of anything reactive, like O2, N2 or CO2. ...
>Divers have been down to the vicinity of 2000' (approx. 60 atms, although
>my copy of Guiness with the exact number as of a few years ago is in a
>box packed away somewhere; I do remember that it was French
>commercial/military divers who set the record), though, which isn't quite
>100 atms, but is within an order of magnitude, so eventually I'm sure
>we'll see it done.
The extremely deep dives don't use anything close to a "normal" air
mixture: Instead of 20% oxygen/80% nitrogen, they use something like
1% oxygen/99% helium. An inert gas like helium avoids alot of the
problems of very high pressures (if you don't mind working with
Mickey Mouse and Donald Duck...)
Frank Crary
CU Boulder
------------------------------
Date: Tue, 30 Mar 1993 05:59:11 GMT
From: Frank Crary <fcrary@ucsu.Colorado.EDU>
Subject: Why is Venus so hot?
Newsgroups: sci.space
In article <C4oApu.I6B@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
>To make Venus habitable, we really have to get *rid* of most of the
>atmosphere somehow. It's a hard problem; the old ideas about just
>seeding the atmosphere with algae or bacteria were hopelessly naive.
I assume someone earlier in the discussion showed that 100 atm.
pressurized domes/structures weren't feasable. But what about a
combination? If you raise the internal pressure to 50 atm, the
structural requirements become reasonable, and 50 atm is breathable
with a helium/oxygen mix.
Frank Crary
CU Boulder
------------------------------
id ac01701; 30 Mar 93 1:45:04 EST
To: bb-sci-space@CRABAPPLE.SRV.CS.CMU.EDU
Xref: crabapple.srv.cs.cmu.edu sci.astro:33779 sci.space:59742
Newsgroups: sci.astro,sci.space
Path: crabapple.srv.cs.cmu.edu!fs7.ece.cmu.edu!europa.eng.gtefsd.com!emory!darwin.sura.net!bogus.sura.net!udel!wupost!uunet!pipex!marble.uknet.ac.uk!mcsun!news.funet.fi!hydra!klaava!mvarila
From: Mikael J Varila <mvarila@klaava.Helsinki.FI>
Subject: Re: Omnimax
Message-Id: <1993Mar29.092431.1425@klaava.Helsinki.FI>
Organization: University of Helsinki
X-Newsreader: TIN [version 1.1 PL6]
References: <1993Mar29.075837.21156@sics.se>
Date: Mon, 29 Mar 1993 09:24:31 GMT
Lines: 7
Sender: news@CRABAPPLE.SRV.CS.CMU.EDU
Source-Info: Sender is really isu@VACATION.VENARI.CS.CMU.EDU
We've got two Omnimax theaters here in finland :
one in helsinki (in the science center Heureka) and
one in oulu (I think this one is also in a science center).
The one in Heureka has shown some local films - nothing
spectacular.
------------------------------
End of Space Digest Volume 16 : Issue 390
------------------------------