X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson
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Fri, 1 Mar 91 02:13:09 -0500 (EST)
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Date: Fri, 1 Mar 91 02:13:06 -0500 (EST)
Subject: SPACE Digest V13 #216
SPACE Digest Volume 13 : Issue 216
Today's Topics:
Galileo Update #2 - 02/28/91
Re: Government vs. Commercial R&D (Really about MSFC)
micro-meteors
Galileo Update - 02/28/91
Moons seen from Mars (followup)
Re: Terraforming, sun shield
Re: chimps in space -- question
Re: Government vs. Commercial R&D (Really about MSFC)
Suggestion for <satellite> Updates format
Re: Space Profits
Moons seen from Mars
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Subject: Re: Government vs. Commercial R&D (Really about MSFC)
In article <1991Feb27.190949.5487@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
>It is a mistake to assume that "advanced propulsion" and "chemical rockets"
>are mutually exclusive.
Small, incremental advances can still be made with chemcial rockets.
Good examples are AMROC's use of hybrid fuels, and OSC/Hercule's
replacement of the first stage with an airplane. It is _not_ a mistake
to observe that chemical rockets have known low limits in their efficiency
which can be breached only by non-rocket or non-chemical technology.
--
Nick Szabo szabo@sequent.com
"What are the _facts_, and to how many decimal places?" -- RAH
------------------------------
Date: 28 Feb 91 17:08:00 GMT
From: swrinde!zaphod.mps.ohio-state.edu!van-bc!ubc-cs!news-server.csri.toronto.edu!helios.physics.utoronto.ca!ists!nereid!white@ucsd.edu (Harold Peter White)
Subject: micro-meteors
Can anyone out there tell me where I can get info on what exists in the
inter-planetary medium in the way of dust, micro-meteors, etc. My library
searches do not seem to be all that productive here.