Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from hogtown.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests) ID ; Fri, 25 Jan 91 10:33:27 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Fri, 25 Jan 91 10:33:23 -0500 (EST) Subject: SPACE Digest V13 #072 SPACE Digest Volume 13 : Issue 72 Today's Topics: Re: some questions Commercial Space Re: turbine space power efficiency query Re: SPACE Digest V13 #041 Pioneer 11 Update - 01/18/91 Re: 2 dimensional objects Orbital Mechanics routines in C, world map wanted Soviet Rocket Booster Re-entry on CNN Re: 2 dimensional objects Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription requests, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- Date: 18 Jan 91 20:44:36 GMT From: optilink!cramer@uunet.uu.net (Clayton Cramer) Subject: Re: some questions In article , ephillip@magnus.ircc.ohio-state.edu (Earl W Phillips) writes: > > 3) Which are the Pioneers/Voyagers that have left the Solar > Syatem? > > * ephillip@magnus.ircc.ohio-state.edu| ``________// * The ones that passed the "Last Chance Saloon", just beyond Pluto! Seriously, how do you define "the Solar System". There is a plausible basis for saying that when you cross the heliopause, you have "left the Solar System", but I don't believe any have done so yet. -- Clayton E. Cramer {pyramid,pixar,tekbspa}!optilink!cramer Motto for San Francisco's "peace" activists: Think globally, fight locally. ====================================================================== You must be kidding! No company would hold opinions like mine! ------------------------------ Date: 18 Jan 91 17:13:23 GMT From: cs.utexas.edu!hellgate.utah.edu!fcom.cc.utah.edu!cc.utah.edu!cc.usu.edu!sl9vr@tut.cis.ohio-state.edu Subject: Commercial Space Beyond the commercial utilization of space currently emphasized, i.e. Earth communications and zero gravity projects, are there other foreseeable commercial utilizations. I am interested in compiling a list of all the commercial possibilities. At present, outside of the above fields, I can only think of the possibility of mining precious minerals from other planets, moons, or asteroids. I would appreciate the input of others on the net or suggested references that I may look at to add to such a list. Thank you for any responses, Jack Scherbel Utah State University, Logan, Utah ------------------------------ Date: 18 Jan 91 23:10:30 GMT From: zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!pitt!nss!Paul.Blase@tut.cis.ohio-state.edu (Paul Blase) Subject: Re: turbine space power efficiency query AG> Does anyone AG> know what the efficiency of turbines generating electricity AG> from sun heated fluids? Are there any studies extrapolating AG> earth based results to orbital figures? Any help would be AG> greatly appreciated. I know NASA Lewis is working on this but AG> I don't have any contacts. 1) Get a subscription to NASA Tech Briefs (contact NASA Tech Briefs, 41 E. 42nd Streen, Suite 921, New York, NY 10017-5391. This magazine lists the results of most current NASA research and how to get a hold of the reports. 2) Talk to a NASA Industrial Applications Center or a NASA field center, they specialize in finding this stuff for the public. For a IAC, call Doris Rouse, Director Technology Application Team, (919) 541-6980. You can also call the NASA Scientific & TEchnical Information Facility at (301) 859-5300 x242,243. (Address in every copy of the Tech Briefs 3) Call Allied Signal Aerospace, who are developing the dynamic power systems for the Space Station, (602) 893-4421. --- via Silver Xpress V2.26 [NR] -- Paul Blase - via FidoNet node 1:129/104 UUCP: ...!pitt!nss!Paul.Blase INTERNET: Paul.Blase@nss.FIDONET.ORG ------------------------------ Date: Sat, 19 Jan 91 21:15:29 EST From: Tommy Mac <18084TM%MSU.BITNET@BITNET.CC.CMU.EDU> Subject: Re: SPACE Digest V13 #041 Re: Al Globus' Mirrors vs. Turbines vs. Photocells for Biospheres: Blow the Trubines and the Photocells. Mirrors get 100% efficiency (in the frequencies that the plants care about anyway). The danger in direct sunlight is the ionizing radiation that you must protect from. But, if you use two sets of mirrors that only reflect visible (around you sheild) you should be fine: No moving parts either [ [ [ [ plant appreciated s [ [ visible / u >----------------------------------c [ / n cosmic [ | [ / gamma [ | [ / x-rays [ c--------------------> / greenhouse uv, ir [ [ / visible [ [ radio [Sheild[ [ [ I've been 'building' a biosphere too. I'd like your opinion on something more 'down to earth'. Imagine that you are given sterile dirt. How do you put a healthy, growing system in it? Starting with seeds, spores and cysts? I shudder for the people that may one day fail to do this correctly in a space colony. Imagine the shipping charges on live animals. Hate to have them die once they get there.... Please respond. Space and the life (that could be) in it fascinate me. Tommy mac (10804tm@msu) Acknowledge-To: <18084TM@MSU> ------------------------------ Date: 19 Jan 91 01:16:05 GMT From: usc!elroy.jpl.nasa.gov!jpl-devvax!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Subject: Pioneer 11 Update - 01/18/91 PIONEER 11 STATUS REPORT January 18, 1991 A precession maneuver was performed by the Pioneer 11 spacecraft. The maneuver was transmitted on January 11, and monitored on January 12. Due to problems at the 70 meter Spain station, spacecraft receiver lock was not observed. Also, ground receiver AGC (Automatice Gain Control) data, used to estimate the accuracy of the maneuver, was also affected. A number of commands associated with maneuver did not execute, including a power off command for the CRT instrument. This caused the battery to come online during the pulse firing. An AGC log is being developed to track the ground receiver AGC to help determine the success of the maneuver. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 19 Jan 91 18:39:30 GMT From: att!mcdchg!tellab5!vpnet!vortex@ucbvax.Berkeley.EDU (Jason J. Levit) Subject: Re: 2 dimensional objects In article <1991Jan19.000511.18161@uokmax.ecn.uoknor.edu> jabishop@uokmax.ecn.uoknor.edu (Jonathan A Bishop) writes: >vortex@vpnet.chi.il.us (Jason J. Levit) writes: > >> 2 dimensional objects (beings?) without any height? WHAT? Is this >> plausible in a 4 dimensional universe? > > What do you mean by 4 dimensional? Three of space and one of time or >four of space? Either way, our universe may have more dimensions of space >than we can perceive, so two dimensional creatures in a four dimensional >(or higher) universe are just as plausible as three dimensional creatures. 3 of space, 1 of time. These guys were claming that these creatures didn't have any height. I find that very hard to believe! -- Jason J. Levit Tornado Chaser Extraordinaire vortex@vpnet.chi.il.us Boing...boing...boing...boing...listen to all that bouncing mail out there! A good planet is hard to find; let's save this one! ------------------------------ Date: 19 Jan 91 18:55:10 GMT From: hacker!steve@uunet.uu.net (Stephen M. Youndt) Subject: Orbital Mechanics routines in C, world map wanted Simply stated, I am looking for routines, in portable C preferably, that I can use to plot orbital elements. I don't want plotting routines just a working set of equations (routines to read the standard 2 line format would be nice as well). If they aren't available in C, any language will do so long as it's easily understood. In addition, I'm after a set of data points to be used in plotting the continents on a world map. I guess you can tell what I'm after from what I've mentioned. Thanks in advance. -- SMY -- Stephen M. Youndt / "Remember, no matter where you go, uunet!hacker!steve / there you are." -- B. Banzai ------------------------------ Date: 19 Jan 91 00:41:07 GMT From: usc!jarthur!jokim@ucsd.edu (John H. Kim) Subject: Soviet Rocket Booster Re-entry on CNN While keeping an eye out for Iraqi missiles during an air raid warning in Israel, CNN taped a very nice shot of the re-entry of some piece of space garbage (it turned out that's what the air raid was about). Reports are that it was a Soviet rocket booster in a decayed orbit. I don't believe this is the type of thing you catch every day on video so I thought you guys might be interested. -- John H. Kim | (This space to be filled when I jokim@jarthur.claremont.edu | think of something very clever uunet!jarthur!jokim | to use as a disclaimer) ------------------------------ Date: 20 Jan 91 10:14:36 GMT From: zaphod.mps.ohio-state.edu!sdd.hp.com!news.cs.indiana.edu!ariel.unm.edu!pprg.unm.edu!topgun!mustang!nntp-server.caltech.edu!steinly@tut.cis.ohio-state.edu (Steinn Sigurdsson) Subject: Re: 2 dimensional objects >I hesitate to point this out, but using Star Trek (even from the Next >Generation) as a source of physical insight is roughly like using Dan Quayle >as a source of political wisdom. If we could only beam him into a bunker >with Saddam Hussein, we could probably assure a bloodless victory... How dare you question the infinite wisdom of The Star Trek Script Writer? He Whose Very Word Is Gospel!!! May A Horde Of Hungry Klingons Ritually Sacrifice You To The Borg!!! Next You Will Undoubtedly Claim That Warp Factor 9 Is Physically Unattainable!!! :-) :-) :-) :-) :-) :-) :-) :-) :-) :-) For the Humour Impaired. PS I like the Dan Quayle idea, unless of course Saddam plays golf... followups on that to alt.desert-storm, other to rec.arts?.star-trekkies -- \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ |Steinn Sigurdsson | standard disclaimer | |Physics, Caltech | | |steinly@gap.caltech.edu | | ------------------------------ End of SPACE Digest V13 #072 *******************