Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from beak.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 ; Wed, 2 May 90 02:11:54 -0400 (EDT) Message-ID: Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Wed, 2 May 90 02:11:26 -0400 (EDT) Subject: SPACE Digest V11 #344 SPACE Digest Volume 11 : Issue 344 Today's Topics: Re: Hubble Trouble Re: Fermi paradox Hubble Space Telescope Update - 05/01/90 News from April 16 Space News Re: French art in orbit? Physics Laws ---------------------------------------------------------------------- Date: 1 May 90 16:12:46 GMT From: news-server.csri.toronto.edu!utgpu!utzoo!henry@rutgers.edu (Henry Spencer) Subject: Re: Hubble Trouble In article <9951@cbnewsh.ATT.COM> lmg@mtqub.ATT.COM (lawrence.m.geary,mt,) writes: >... Dumb question: With all the early problems >they were having with HST, why didn't they have the shuttle stay >around just a little longer, so they could go back and fix it? Well, among other things, extra stay time in orbit means more mass for consumables, and it's difficult to reconcile that with getting HST into the highest possible orbit. For example, Discovery had enough fuel to return to HST if the telescope's lid had refused to open... but only *just barely* enough. There had to be some specific rule about when Discovery's responsibility ended and HST was on its own. The cutoff point that was chosen was, in fact, the opening of the lid. -- If OSI is the answer, what is | Henry Spencer at U of Toronto Zoology the question?? -Rolf Nordhagen| uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: 1 May 90 15:07:31 GMT From: mentor.cc.purdue.edu!l.cc.purdue.edu!cik@purdue.edu (Herman Rubin) Subject: Re: Fermi paradox In article <1990Apr29.154227.14877@helios.physics.utoronto.ca>, neufeld@physics.utoronto.ca (Christopher Neufeld) writes: > In article <3513@tymix.UUCP> pnelson@hobbes.UUCP (Phil Nelson) writes: > >In article <1990Apr28.154138.4086@helios.physics.utoronto.ca> neufeld@physics.utoronto.ca (Christopher Neufeld) writes: > >>In article <3511@tymix.UUCP> pnelson@hobbes.UUCP (Phil Nelson) writes: ...................... > My point was merely this: if somebody came up to you tomorrow with a > machine would would, by some unknown means, count all the stars with > life-bearing planets in the universe, and before turning it on he bet > you N dollars that there would be none other than ours, you would be > well advised to take the bet at up to odds of 1.7 against you (you put > up $1.70 to win $1.00). This is from (1-1/e)/(1/e) = 1.72. Your betting scheme should depend on your prior probabilities. The calculation assumes something about "uninformativeness" which is, unfortunately, totally self-inconsistent. The nature of the assumptions are the same whether it is the existence of life or the existence of intellingent bipedal mammalian life using electronic computer, with the most commonly used "international" language having a 26-letter alphabet with upper and lower case, etc. This is clearly not so. .................... -- Herman Rubin, Dept. of Statistics, Purdue Univ., West Lafayette IN47907 Phone: (317)494-6054 hrubin@l.cc.purdue.edu (Internet, bitnet) {purdue,pur-ee}!l.cc!cik(UUCP) ------------------------------ Date: 1 May 90 22:20:47 GMT From: sdd.hp.com!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Subject: Hubble Space Telescope Update - 05/01/90 HUBBLE SPACE TELESCOPE UPDATE MAY 1, 1990 The Hubble Space Telescope project reports that data is being analyzed from two series of tests run recently. Tests were performed on the two high gain antennas to map out safe regions where both high gain antennas can safely operate without obstruction. The next step for the team is to moderate ground and flight software to limit the travel of the high gain antennas to those regions that have been mapped. The Hubble team also is getting preliminary information on the alignment of the three fine guidance sensors by pattern matching star fields through the optics of the telescope. Ron Baalke | baalke@mars.jpl.nasa.gov Jet Propulsion Lab M/S 301-355 | baalke@jems.jpl.nasa.gov 4800 Oak Grove Dr. | Pasadena, CA 91109 | Go Lakers! ------------------------------ Date: 2 May 90 02:06:04 GMT From: ox.com!itivax!vax3.iti.org!aws@CS.YALE.EDU (Allen W. Sherzer) Subject: News from April 16 Space News From the April 16 issue of Space News. Space News is published by by the Times Journal company. Rates are $75 per year but there was a $50 intro rate. Send subscription requests to: Times Journal Company Springfield Va 22159-0500 You can also call 703-750-8600 to charge with plastic. -- The Air Force Systems Division, LA, and the AF Astronautics Lab, Edwards AFB plan to award a $725,000 contract to specify a conceptual design for a solar powered upper stage. A Solar Upper Stage is expected to be developed by the turn of the century. Unlike existing upper stages which take payloads to orbit in a few days the solar powered stage will take months to get its payload to GEO. However, the solar stage will be much cheaper and offer the potential of returning damaged satellites to LEO for repair. -- The Brizialian government is awarding Hughes a contract to build two new communication satellites. Hughes beat Canadian Spar Aerospace for the contract. The satellites will be launched by Arianespace who beat McDonnell Douglas Space Systems Co. for the launch contract. The satellites will replace two existing satellites which will reach the end of their operational lives in 93 and 94. -- The USSR has proposed providing Proton launchers to Brazil. The Proton's would be launched from a space facility being developed at Alcantra which is on the Atlantic cost just two degrees south of the equator. -- The Bush administration intends to adopt a new commercial space policy which will provide strong support for young US space industries according to Dan Quale. The first part of the policy is to be completed by June 1. The Space Council policy will outline what the government can do to ensure that US commercial launchers can compete successfully in the world market. The review will also determine if the government should buy private launch services to the maximum extent possible and how the US should compete with foreign competition. -- Sensors on the delta wing of the Pegasus booster were used to collect date on wing stresses, temp, and the location of shock waves while in hypersonic flight. The data was collected for a 90 second period during the first Pegasus flight. The data will be used to verify computer simulations of hypersonic flight. Preliminary indications are that the computer models worked very well. -- Pressure is growing for the European Space Agency to abandon its 'fair return' policy. This policy gives ESA member states contracts according to the countries contrabution to ESA. -- The West German Space Agency plans to establish a commercial organization to operate and market its payloads on the Columbus space station. -- A UN committee will meet on June 4 to vote on proposed global standards that would limit the use of nuclear power on space missions where the power requirements cannot be 'reasonably' met by non-nuclear systems. -- Lawrence Livermore plans to award a contract this summer to create a detailed design of inflatable structures for their proposed moon-Mars effort called the Great Exploration. NASA still says the idea wont' work and Wood (of LLNL) says 'oh yeah!'. [Looks like they are serious about this. I hope they are allowed to go with it. The competition will do NASA a lot of good.] ----------------------------------------------------------------------------- | Allen W. Sherzer | Real men write self modifying code. | | aws@iti.org | | ----------------------------------------------------------------------------- ------------------------------ Date: 1 May 90 19:07:59 GMT From: amdahl!khearn@sun.com (Bug Hunter) Subject: Re: French art in orbit? In article <101874@convex.convex.com> ewright@convex.com (Edward V. Wright) writes: >msdos@quiche.cs.mcgill.ca (Mark SOKOLOWSKI) writes: > >>I don't remember the name of the 2 satellites that were lauched in the 60's, >>but I know they were deisgned to reflect radio waves and their mission was >>a failure due to the rapid deflation provoked by micrometoeritic impacts. > >Echo. Echo. -- Keith Hearn \ khearn@amdahl.com \ I haven't lost my mind, Amdahl Corporation \ It's backed up on tape somewhere. (408)737-5691(work) (408)984-6937(home)\ ------------------------------ Date: 2 May 90 05:09:31 GMT From: mentor.cc.purdue.edu!o0j@purdue.edu (pat canganelli) Subject: Physics Laws Hi, this is my first posting to this group, so please excuse any mistakes. Some time ago, around 1980, a friend gave me a sheet of paper titled, Troy's Physics Laws. The following is a transcript of these laws. (I know very little about physics, so excuse my ignorance.) Zero Dimension = Concept (positive/negative) First Dimension = Length Second Dimension = Height Third Dimension = Width Fourth Dimension = Depth Fifth Dimension = Time Sixth Dimension = Relativity (Location) Seventh Dimension = Expanse Eighth Dimension = Yield (Energy/Synergy) Ninth Dimension = Infinity I have tried to find references to this information, but I have failed to find anything useful. I don't know who Troy is and people who I've asked have never heard of Troy before. (Neither have I.) I am in desperate need of an explanation of these dimensions, so if anyone could further identify this listing for me or point me toward a good reference book I would be very grateful. Thanks for your time and effort. --Lisa Purvis lisa@asterix.lib.purdue.edu ------------------------------ End of SPACE Digest V11 #344 *******************