Space & Astronomy/Space and Astronomy (October 1993).iso/mac/TEXT_ZIP/spacedig/V16_5/V16NO505.ZIP/V16NO505

Internet Message Format | 1993-07-13 | 33KB

Date: Sun,  2 May 93 05:07:04
From: Space Digest maintainer <[e-mail]>
Reply-To: [e-mail]
Subject: Space Digest V16 #505
To: Space Digest Readers
Precedence: bulk


Space Digest                Sun,  2 May 93       Volume 16 : Issue 505

Today's Topics:
                        Abyss-breathing fluids
           ASTRONAUTS---What does weightlessness feel like?
            Displaying compressed Voyager images on a Mac
                      Galileo Update - 04/29/93
            Gamma Ray Bursters. positional stuff. (2 msgs)
             Gamma Ray Bursters. WHere are they. (2 msgs)
                            HyperKnowledge
                               Level 5?
                       Long term Human Missions
      New inexpensive method for determining ore & oil locations
             Two-Line Orbital Element Set:  Space Shuttle
                         Vandalizing the sky.
                 What planets are habitable (2 msgs)
      Why not give $1 billion to first year-long moon residents?

    Welcome to the Space Digest!!  Please send your messages to
    "[e-mail]", and (un)subscription requests of the form
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    (BITNET), rice::boyle (SPAN/NSInet), utadnx::utspan::rice::boyle
    (THENET), or [e-mail] (Internet).
----------------------------------------------------------------------

Date: Thu, 29 Apr 93 19:26:22 BST
From: Ata Etemadi <[e-mail]>
Subject: Abyss-breathing fluids
Newsgroups: sci.space

"The Forever War", one of my favorite SciFi books, had a passage devoted to
breathing fluids. The idea was to protect people from the high accelerations
required for interstellar travel by emersing the passengers in dry-cleaning
fluid saturated with oxygen. Plenty of very imaginative ideas is this book.
I would certainly recommend it (won the Hugo and the Nebula awards).

    regards
        Ata <(|)>.

------------------------------

Date: 29 Apr 1993 17:35 UT
From: Ron Baalke <[e-mail]>
Subject: ASTRONAUTS---What does weightlessness feel like?
Newsgroups: sci.space,sci.astro

In article <[e-mail]>, [e-mail] (Jerry Liebelson) writes...
> I want to know what weightlessness actually FEELS like. For example, is
>there a constant sensation of falling?

Yes, weightlessness does feel like falling.  It may feel strange at first,
but the body does adjust.  The feeling is not too different from that
of sky diving.

>And what is the motion sickness
>that some astronauts occasionally experience?

It is the body's reaction to a strange environment.  It appears to be induced
partly to physical discomfort and part to mental distress.  Some people are
more prone to it than others, like some people are more prone to get sick
on a roller coaster ride than others.  The mental part is usually induced by
a lack of clear indication of which way is up or down, ie: the Shuttle is
normally oriented with its cargo bay pointed towards Earth, so the Earth
(or ground) is "above" the head of the astronauts.  About 50% of the astronauts
experience some form of motion sickness, and NASA has done numerous tests in
space to try to see how to keep the number of occurances down.
     ___    _____     ___
    /_ /|  /____/ \  /_ /|     Ron Baalke         | [e-mail]
    | | | |  __ \ /| | | |     Jet Propulsion Lab |
 ___| | | | |__) |/  | | |__   M/S 525-3684 Telos | The aweto from New Zealand
/___| | | |  ___/    | |/__ /| Pasadena, CA 91109 | is part caterpillar and
|_____|/  |_|/       |_____|/                     | part vegetable.

------------------------------

Date: Thu, 29 Apr 1993 16:44:00 GMT
From: "E. V. Bell, II - NSSDC/HSTX/GSFC/NASA - (301" <[e-mail]>
Subject: Displaying compressed Voyager images on a Mac
Newsgroups: sci.space

    Sorry, I've lost track of who asked the question originally
    (our news server at GSFC keeps things around for tremendously
    short periods of time), but wanted to be certain before I
    replied. Someone asked about displaying the compressed images
    from the Voyager imaging CD-ROMs on a Mac. As Peter Ford (MIT)
    pointed out, a decompression program is available via FTP.
    (Sorry, I don't remember the name of the node offhand,
    although it's .mit.edu.) In any case, though, one of the MAC
    display programs (CD ROM Browser by Dana Swift) does display
    the compressed images directly. The program is shareware and
    is distributed by NSSDC for nominal reproduction costs ($9 +
    shipping, if memory serves). This does *not* cover the
    shareware price which should go to Dana for his diligent work
    and upgrades, however.

    To request current pricing information, information about
    available display software, catalogs, or data from NSSDC,
    contact our user support office at:

        National Space Science Data Center
        Coordinated Request and User Support Office (CRUSO)
        Mail Code 633
        NASA/Goddard Space Flight Center
        Greenbelt, MD   20771
        Phone: [phone]
        Fax:   [phone]

+------------------------------------------------------------------------------+
|  Dr. Edwin V. Bell, II    |  E-mail:                       |
|  Mail Code 633.9        |    (SPAN) NCF::Bell               |
|  National Space Science    |    or   NSSDC::Bell               |
|    Data Center        |    or  NSSDCA::Bell               |
|  NASA                |    or  NSSDCB::Bell               |
|  Goddard Space Flight Center    |   (Internet) [e-mail]       |
|  Greenbelt, MD   20771    |                           |
|  [phone]        |                           |
+------------------------------------------------------------------------------+

------------------------------

Date: 29 Apr 1993 21:59 UT
From: Ron Baalke <[e-mail]>
Subject: Galileo Update - 04/29/93
Newsgroups: sci.space,sci.astro,alt.sci.planetary

Forwarded from Neal Ausman, Galileo Mission Director

                                 GALILEO
                     MISSION DIRECTOR STATUS REPORT
                               POST-LAUNCH
                           April 23 - 29, 1993

SPACECRAFT

1.  On April 22 and 23, delta Differenced One-way Range (DOR) passes were
performed over DSS-14/63 (Goldstone/Madrid 70 meter antennas) and DSS-14/43
(Goldstone/Canberra 70 meter antennas), respectively.  Initial results
indicate the delta DOR pass on April 22 was unsuccessful due to ground
station hardware problems but the one on April 23 was successfully performed.

2.  On April 23, a cruise science Memory Readout (MRO) was performed for the
Magnetometer (MAG) instrument.  Analysis indicates the data was received
properly.

3.  On April 23, the spare power relay contacts were commanded closed via the
spacecraft stored sequence.  These relays were commanded closed by the CDS
(Command Data Subsystem) prior to launch and were again commanded closed to
preclude the possibility at Jupiter of the PPS relays/wiring being a
source of internal electrostatic charge (IESD).

4.  On April 26, cruise science Memory Readouts (MRO) were performed for the
Extreme Ultraviolet Spectrometer (EUV), Dust Detector (DDS), and Magnetometer
(MAG) instruments.  Preliminary analysis indicates the data was received
properly.

5.  During the period from April 26 to April 27, a navigation cycle was
performed.  This navigation cycle provided near-continuous acquisition of
two-way doppler and ranging data during three consecutive passes of the
spacecraft over DSS-63, DSS-14, and DSS-43.

6.  On April 26, real-time commands were sent to test slew the Radio Relay
Antenna (RRA) in preparation for the mini-sequence slew test on April 28.
The RRA was slewed from approximately 3.5 degrees from stow to approximately
20.3 degrees.  Preliminary analysis indicated the antenna slewed to about 18
degrees which was well within the predicted range.  The RRA was commanded back
to approximately 15.2 degrees from stow.  Preliminary analysis indicated the
antenna reached about 15.8 degrees also well within the predicted range.  The
RRA motor temperature was at 1 degree C at the start of the activity and had
increased to 1.6 degrees C at its completion.

     After verifying proper RRA slewing, the RRA slew test mini-sequence was
uplinked to the spacecraft for execution on April 28.  Upon successful uplink,
a Delayed Action Command (DAC) was sent which will reposition the stator on
May 4 to its initial pre-test position.  Also, a DAC was sent to turn the
Two-Way Noncoherent (TWNC) on April 28 prior to the start of the RRA slew test
mini-sequence.

7.  On April 27, a NO-OP command was sent to reset the command loss timer to
264 hours, its planned value during this mission phase.

8.  On April 28, the RRA slew test executed nominally.  The spacecraft under
stored sequence control performed six RRA slews starting at about 16 degrees
from stow and going to 53 degrees, back to 25 degrees, then to 51 degrees,
back to 22 degrees, then to 48 degrees and then back to 21 degrees.  All of
the slews were well within the predicted range.  The RRA motor temperature was
at 2.3 degrees C at the start of the activity and had increased to 4.4
degrees C at its completion.  After completion of the RRA slews, real-time
commands were sent to reconfigure back to the pre-test configuration.

9.  The AC/DC bus imbalance measurements have not exhibited significant change
(greater than 25 DN) throughout this period.  The AC measurement reads 17 DN
(3.9 volts).  The DC measurement reads 134 DN (15.7 volts).  These
measurements are consistent with the model developed by the AC/DC special
anomaly team.

10. The Spacecraft status as of April 29, 1993, is as follows:

       a)  System Power Margin -  75 watts
       b)  Spin Configuration - Dual-Spin
       c)  Spin Rate/Sensor - 3.15rpm/Star Scanner
       d)  Spacecraft Attitude is approximately 23 degrees
           off-sun (lagging) and 4 degrees off-earth (leading)
       e)  Downlink telemetry rate/antenna- 40bps(coded)/LGA-1
       f)  General Thermal Control - all temperatures within
           acceptable range
       g)  RPM Tank Pressures - all within acceptable range
       h)  Orbiter Science- Instruments powered on are the PWS,
           EUV, UVS, EPD, MAG, HIC, and DDS
       i)  Probe/RRH - powered off, temperatures within
           acceptable range
       j)  CMD Loss Timer Setting - 264 hours
           Time To Initiation - 203 hours


GDS (Ground Data Systems):

1.  The first Galileo-GDS test of the MGDS V18.0 Command System (CMD) took
place April 27, 1993 with DSS-61 (Madrid 34 meter antenna).  The test went
well and demonstrated that the new command system interfaced with the new DSN
(Deep Space Network) Group 5 Command Processor Assembly (CPA).  The test was
successful and the next test for V18.0 CMD is scheduled for May 1, 1993 with
DSS-15 (Goldstone 34 meter antenna).

2.  The April System Engineers Monthly Report(SEMR)/Ground System Development
Office (GSDO) MMR was conducted Thursday, April 29.   A review of current
Project and Institutional (DSN and MOSO) system status was conducted.  On-going
cruise development plus the GSDO Phase 1 and 2 delivery schedules, past months
accomplishments  and potential problem areas were discussed.  No significant
schedule changes or significant problems were reported.


TRAJECTORY

     As of noon Thursday, April 29, 1993, the Galileo Spacecraft trajectory
status was as follows:

    Distance from Earth         187,745,300 km (1.26 AU)
    Distance from Sun           296,335,800 km (1.98 AU)
    Heliocentric Speed          89,100 km per hour
    Distance from Jupiter       522,015,800 km
    Round Trip Light Time       20 minutes, 58 seconds

SPECIAL TOPIC

1.  As of April 29, 1993, a total of 70259 real-time commands have been
transmitted to Galileo since Launch.  Of these, 65150  were initiated in the
sequence design process and 5109 initiated in the real-time command process.
In the past week, 74 real time commands were transmitted: 73 were initiated
in the sequence design process and one initiated in the real time command
process.  Major command activities included commands to perform the initial
RRA slew test, uplink the RRA slew test mini-sequence, DACs to reposition the
stator and turn the TWNC on, reset the command loss timer, and execute the
RRA slew test.
     ___    _____     ___
    /_ /|  /____/ \  /_ /|     Ron Baalke         | [e-mail]
    | | | |  __ \ /| | | |     Jet Propulsion Lab |
 ___| | | | |__) |/  | | |__   M/S 525-3684 Telos | The aweto from New Zealand
/___| | | |  ___/    | |/__ /| Pasadena, CA 91109 | is part caterpillar and
|_____|/  |_|/       |_____|/                     | part vegetable.

------------------------------

Date: 29 Apr 1993 17:25:31 GMT
From: "David M. Palmer" <[e-mail]>
Subject: Gamma Ray Bursters. positional stuff.
Newsgroups: sci.space,sci.astro

[e-mail] (Henry Spencer) writes:

>In article <[e-mail]> [e-mail] writes:
>>        Actually, my advisor, another classmate of mine, and me were talking
>>the other day about putting just one detector on one of the Pluto satellites.
>>THen we realized that the satellite alone is only carrying something like 200
>>pounds of eq.  Well, a BATSE detector needs lead shielding to protect it,
>>and 1 alone weighs about 200 pounds itself.

>Actually, the situation is even worse than that.  The *total mass* of the
>Pluto Fast Flyby spacecraft is only 250ish pounds, and most of that is
>support equipment like power and communications.  The mass available for
>instruments is maybe 10% of that.  I don't think a BATSE will fit...

From the Pluto Fast Flyby Instrument definition research anouncemnet,
the instrument payload constraints are:
    Mass allocation -  7 kilograms (15.4 lbs)
    Power allocation - 6 watts
    Required instruments:
    Visible imaging system (1024x1024 CCD, 750 mm fl, f/10 optics)
    IR mapping spectrometer (256x256 HgCdTe array, 0.3% energy resolution)
    UV spectrometer (55-200 nm, 0.5 nm resolution)
    Radio science (ultrastable oscilator incorporated in telecom system)
        ultrastable means 10^-14.

This doesn't leave much room for payloads which are totally unrelated
to the  mission of the spacecraft.  In addition, the power will come
from a radioisotope thermal generator, and the whole space craft will
be about 2 feet in diameter, with no booms, which means there will be
strong gamma-lines from Pu-239 and associated schmutz in the
background, which tends to reduce sensitivity somewhat.

It would still be nice, and our group here at Goddard is looking
in to it.

--
        David M. Palmer        [e-mail]
                    [e-mail]

------------------------------

Date: Thu, 29 Apr 1993 22:07:48 GMT
From: "Phil G. Fraering" <[e-mail]>
Subject: Gamma Ray Bursters. positional stuff.
Newsgroups: sci.space,sci.astro

[e-mail] writes:

>        Actually, my advisor, another classmate of mine, and me were
>talking the other day about putting just one detector on one of the
>Pluto satellites.  THen we realized that the satellite alone is only
>carrying something like 200 pounds of eq.  Well, a BATSE detector
>needs lead shielding to protect it, and 1 alone weighs about 200
>pounds itself.

>        We decided against it.
                                                        -jeremy
Are you talking about a single BATSE component, or
the whole thing?

You *could* propose a BATSE probe; launch two or three with ion
drive on various planetary trajectories... your resolution increaces
the more they're spaced apart. You could probably cheaply eject them
from the solar system with enough flybys and patience.

Things would start out slow, then slowly get better and better
resolution...
--
Phil Fraering         |"Seems like every day we find out all sorts of stuff.
[e-mail]|Like how the ancient Mayans had televison." Repo Man

------------------------------

Date: Thu, 29 Apr 1993 21:56:39 GMT
From: "Phil G. Fraering" <[e-mail]>
Subject: Gamma Ray Bursters. WHere are they.
Newsgroups: sci.space

[e-mail] (Pat) writes:


>4)  we know it's not real close,  like  slightly extra solar,  because
>we have no parallax measurements on the bursts.

Correct, we have no parallax measurements on the bursts.

Therefore, we can't tell whether they're slightly extra solar
or not!

(which means that parallax can't tell us whether or not it's real close.)

--
Phil Fraering         |"Seems like every day we find out all sorts of stuff.
[e-mail]|Like how the ancient Mayans had televison." Repo Man

------------------------------

Date: Thu, 29 Apr 1993 22:00:26 GMT
From: "Phil G. Fraering" <[e-mail]>
Subject: Gamma Ray Bursters. WHere are they.
Newsgroups: sci.astro,sci.space

[e-mail] (Ethan Bradford) writes:

>[e-mail] (Walker Andrew John) writes:
>       Also,if they did come from the Oort cloud we would expect to
>   see the same from other stars Oort Clouds.

>That's a very good point.  Perhaps none of the nearby stars have Oort
>clouds?  Alpha-centauri is a multiple-star system; you wouldn't expect
>an Oort cloud in it.

Sure about that? Maybe Proxima might cause problems, but at Oort
Cloud distances AC a and AC b together look like a point source.

Besides, even the solar system's Oort cloud is unstable over
geologic time, right, and needs to be replentished from somewhere
else, like the short period comets of the Kupier Belt?

(Or maybe I'm misremembering something I read or heard somewhere...)

>  What's the nearest single-star that is likely to
>have a planetary system?

Until we're able to perform a broad-band survey of nearby stars
to detect planets, we won't know enough to say whether or not
a single star has planets. And we're likely to find out about the
close ones first.

Heck, if neutron stars can have planets, anything can have planets.
(Or was that discovery disconfirmed?)

--
Phil Fraering         |"Seems like every day we find out all sorts of stuff.
[e-mail]|Like how the ancient Mayans had televison." Repo Man

------------------------------

Date: Thu, 29 Apr 93 22:58:59 BST
From: Ata Etemadi <[e-mail]>
Subject: HyperKnowledge
Newsgroups: sci.space

In article <[e-mail]>, [e-mail] writes:
-| In article <[e-mail]>, [e-mail] (Georg Tuparev) writes...
-| >
-| >
-| >ANNOUNCEMENT:    The "HyperKnowledge" PROJECT for NeXTSTEP
-|
-| I know this is kinda off the subject of sci.space, but not really, I want to
-| answer this for their, as well as everyone else's information.  What these
-| people are proposing, by and large already exists and can be purchased today.
-|
-| It is called labview by National Instruments. IT is a wonderful object
-| IT is a wonderful object oriented graphical programming language.
-| [some lines deleted]

I am afraid you are mis-directed. NeXTSTEP is an operating system as opposed to
a package. I have read a little about it but since Steve Jobs does not seem to
have the marketing capabilities of Bill Gates my info. is limited. Probably why
the far inferior Windows NT is going to be more widely distributed (but that
is another flame-ridden story). Some of the innovative features of NeXTSTEP are
binary compatibility across platforms (eg you can just copy your program from
a Sparc to a PC and it would run, as opposed to buying the version of the package
ported to a PC), graphical object-oriented design (its all WSIWIG postscript),
supports parallel hetrogeneous processing, and best of all it is based around
the Mach micro-kernel so you can make it look like Unix with X, or DOS, or NT or
even VMS if you feel the need. No package out there comes even close. I hope
people will subscribe to the HyperKnowledge project and NeXTSTEP finally
takes off in my lifetime :-)
--
| Mail          Dr Ata Etemadi, Blackett Laboratory,                          |
|               Space and Atmospheric Physics Group,                          |
|               Imperial College of Science, Technology, and Medicine         |
| Internet/Arpanet/Earn/Bitnet [e-mail] or [e-mail]  |
| Span                              SPVA::atae       or     MSSLC:atae        |

------------------------------

Date: Thu, 29 Apr 93 14:37:15 CDT
From: Bret Wingert <[e-mail]>
Subject: Level 5?
Newsgroups: sci.space

>  From: [e-mail] ( David Harris)
>  Message-Id: <[e-mail]>
>  To: [e-mail]
>  Subject: RE: Level 5 Shuttle Software Work
>
>  Bret,
>
>  If you are familiar with the software work that received the Level 5
>  rating, could you post a description of it and/or some references?  I
>  think many people would be interested to know just what the IBM team
>  on that effort is doing differently from most other organizations/projects
>  that earned them that rating.

I am familiar with the project.  It is the Onboard Shuttle Flight
Software Project.  This software controls the Space Shuttle During
all dynamic phases as well as on-orbit.
It has ultra-high reliability and extremely
low error rates.  There have been several papers published on the
subject and I'll collect some references.  There may be an
article in the IBM Systems Journal Late '93, early '94.

There is no magic formula.  We did it with dedicated and disciplined
folks who worked to put together a process that finds and removes errors
and is corrected based on errors that "escape".  We present a
one day overview of our process periodically to interested folks.
The next one is May 19th in Washington, D.C.  I can fax specifics
to those who are interested.

Bret Wingert
[e-mail]

(713)-282-7534
FAX: [phone]

------------------------------

Date: 29 Apr 1993 18:18:16 GMT
From: grungy <[e-mail]>
Subject: Long term Human Missions
Newsgroups: sci.space

In article <[e-mail]>,
[e-mail] (Ward Paul) wrote:
> >1.    Calculators
> >2.    Teflon (So your eggs don't stick in the pan)
> >3.    Pacemakers (Kept my grandfather alive from 1976 until 1988)
>
> I don't think touting contributions is a good idea.  World War II produced
> many many beneficial spinoffs.  Eg. Radar, jet aeroplanes, rocket technology.
> I don't think anyone would argue that World War II was, in and of itself,
> a good thing.
>
> If you want people to back the space program it must be a good thing in
> and of itself.

I disagree with what to tout, although I agree that the space program is
inherently a good thing.  Most people today only care about "what will it
cost me?" and "what's in it for me?" and could care less about whether
something is simply worthwhile in and of itself.  Our society has become
increasingly geared toward the short-term (which you could read as NOW!).
They couldn't care less about next week, much less next century.  They want
something to show for the expenditure and they want it *now*.

I think we *should* tell them about the things that they are using now that
are spinoffs of the space program.  That is the only way you can *prove*
its worth to *them* - and they vote and pay taxes too.  The continued
existence of the space program relies upon that money.

just my $.02

BTW: don't forget Velcro...

bcnu - John Gladu
Systems Support Center -- Baylor College of Medicine
INTERNET: [e-mail]  | VOICE: [phone]
 US MAIL:  One Baylor Plaza, Houston, Texas  77030
.opinions expressed are just that.obviously.

------------------------------

Date: Tue, 27 Apr 1993 11:39:59 GMT
From: Vladimir <[e-mail]>
Subject: New inexpensive method for determining ore & oil locations
Newsgroups: eunet.misc,eunet.newprod,sci.geo.geology,sci.misc,sci.space

        Dear gentlemen!

The firm called "INTERBUSINESS,LTD" offers quite inexpensive
method to determine ore & oil locations all over the world.
In this method used data got from space satellites. Being
in your office and using theese data you can get a good statis-
tical prognosis of locations mentioned above.

        This prognosis could be done for any part of the world!
If you're interested in details please send E-mail:

        [e-mail]

        Sushkov Vladimir,
        Moscow, Russia.

------------------------------

Date: Thu, 29 Apr 1993 22:27:19 GMT
From: TS Kelso <[e-mail]>
Subject: Two-Line Orbital Element Set:  Space Shuttle
Newsgroups: sci.space

The most current orbital elements from the NORAD two-line element sets are
carried on the Celestial BBS, [phone], and are updated daily (when
possible).  Documentation and tracking software are also available on this
system.  As a service to the satellite user community, the most current
elements for the current shuttle mission are provided below.  The Celestial
BBS may be accessed 24 hours/day at 300, 1200, 2400, 4800, or 9600 bps using
8 data bits, 1 stop bit, no parity.

Element sets (also updated daily), shuttle elements, and some documentation
and software are also available via anonymous ftp from archive.afit.af.mil
(129.92.1.66) in the directory pub/space.

STS 55
1 22640U 93 27  A 93119.24999999  .00041555  00000-0  12437-3 0    90
2 22640  28.4657 249.3697 0008512 260.9747 152.1416 15.90732913   425
--
Dr TS Kelso                           Assistant Professor of Space Operations
[e-mail]                    Air Force Institute of Technology

------------------------------

Date: Thu, 29 Apr 1993 17:41:05 GMT
From: Josh Hopkins <[e-mail]>
Subject: Vandalizing the sky.
Newsgroups: sci.astro,sci.space

I'm wondering if "vandalize" is the proper word to use in this situation.  My
dictionary defines "vandalism" as "the willful or malicious destructuion of
public or private property, especially of anything beautiful or artisitc." I
would agree the sky is beautiful, but not that it is public or private property.

I personally prefer natural skies, far from city lights and sans aircraft.
However, there is also something to be said for being able to look up into the
sky and see a satellite.  Many people get a real kick out of it, especially if
they haven't seen one before.
--
Josh Hopkins                                          [e-mail]
            "Find a way or make one."
                 -attributed to Hannibal

------------------------------

Date: 29 Apr 93 15:48:45 GMT
From: fred j mccall 575-3539 <[e-mail]>
Subject: What planets are habitable
Newsgroups: sci.space

In <[e-mail]> [e-mail] writes:

>In article <[e-mail]>, [e-mail] (Doug Loss) writes:

>>>
>>    Dandridge Cole and Isaac Asimov collaborated on a book titled,
>> "Habitable Planets for Man" (I think) in 1964.  It should be available
>> in most good libraries, or through inter-library loan.
>>

>This is the high-school science version; the original Rand study by
>Stephen H Dole "Planets for Man" gives the harder numbers & graphs &
>such (but predates Michael Hart's (& later) work on continuously
>habitable zones)

Is this still in print or available (other than on loan)?  I remember
reading this many years ago and it's still the best thing I remember
in this vein.

--
"Insisting on perfect safety is for people who don't have the balls to live
 in the real world."   -- Mary Shafer, NASA Ames Dryden
------------------------------------------------------------------------------
[e-mail] - I don't speak for others and they don't speak for me.

------------------------------

Date: 29 Apr 93 11:46:22 GMT
From: [e-mail]
Subject: What planets are habitable
Newsgroups: sci.space

In article <[e-mail]>, [e-mail] (Doug Loss) writes:
> In article <[e-mail]> [e-mail] (Jonathan P. Gibbons) writes:

>>I would appreciate any thoughts on what makes a planet habitable for Humans.
>>I am making asumptions that life and a similar atmosphere evolve given a range
>>of physical aspects of the planet.  The question is what physical aspects
>>simply disallow earth like conditions.
>> [deleted]

>>
>    Dandridge Cole and Isaac Asimov collaborated on a book titled,
> "Habitable Planets for Man" (I think) in 1964.  It should be available
> in most good libraries, or through inter-library loan.
>

This is the high-school science version; the original Rand study by
Stephen H Dole "Planets for Man" gives the harder numbers & graphs &
such (but predates Michael Hart's (& later) work on continuously
habitable zones)

------------------------------

Date: 27 Apr 93 20:27:10 GMT
From: Ralph Buttigieg <[e-mail]>
Subject: Why not give $1 billion to first year-long moon residents?
Newsgroups: sci.space

Original to: [e-mail]
G'day [e-mail]

20 Apr 93 18:17, [e-mail] wrote to All:

 wAC> [e-mail] (Bruce Watson), via Kralizec 3:713/602

 wAC> The Apollo program cost something like $25 billion at a time when
 wAC> the value of a dollar was worth more than it is now. No one would
 wAC> take the offer.

If we assume 6% inflation since 1969, that $25B would be worth about $100B
GD reckon a moon mission today could cost only $10B. Thats a factor of ten
reduction in cost. It might be possible to reduce that number futher by
using a few shortcuts ( Russian rockets?).   Asuming it gets built, I think
the Delta Clipper could very well achive the goal.

ta

Ralph

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Subject: Re: Long Term Space Voyanges and Effect NEwsgroup?
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In article <[e-mail]> [e-mail] (Henry Spencer)
writes in response to Michael Adams post:
>>I vote for a later on sci.space.medicine or similar newsgroup fro the
>>discussion of long term missions into space and there affects on humans and
>>such..- Adams
>
>Why bother with a new newsgroup?  If you want to discuss the subject,
>*start discussing it*.  If there is enough traffic to annoy the rest of
>us, we will let you know... and *then* it will be time for a new newsgroup.

Well, here goes.

The first item of business is to establish the importance space life
sciences in the whole of scheme of humankind.  I mean compared
to football and baseball, the average joe schmoe doesn't seem interested
or even curious about spaceflight.  I think that this forum can
make a major change in that lack of insight and education.

All of us, in our own way, can contribute to a comprehensive document
which can be released to the general public around the world.  The
document would scientifically analyze the technical aspects of long
term human habitation in space.

I believe that if any long-term space exploration program is to
succeed we need to basically learn how to engineer our own microworld
(i.e. the spacecraft).  Only through the careful analyses of engineering,
chemical, biological, and medical factors will a good ecosystem be created
to facilitate human life on a long-duration flight.

So, I would like to see posts of opinions regarding the most objective
methods to analyze the accepted scientific literature for technologies
which can be applied to long-duration spaceflight.  Such a detailed
literature search would be of interest to ourselves as space advocates
and clearly important to existing space programs.

In essence, we would be dividing the space life science issues into
various technical problems which could be solved with various technologies.
This database of acceptable solutions to various problems could form the
basis of detailed discussions involving people from the bionet, isunet,
and any other source!

I'm eager to hear your comments and see posts on this thread.

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End of Space Digest Volume 16 : Issue 505
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