Date: Thu, 15 Apr 93 05:06:13 From: Space Digest maintainer Reply-To: Space-request@isu.isunet.edu Subject: Space Digest V16 #460 To: Space Digest Readers Precedence: bulk Space Digest Thu, 15 Apr 93 Volume 16 : Issue 460 Today's Topics: Apollo Training in Iceland Comet in Temporary Orbit Around Jupiter? DC-X update??? (2 msgs) How to get there? (was Re: Comet in Temporary Orbit Around Jupiter? Is Hubble looking at SN1993J? (2 msgs) Ozone-Detstroying Chlorine Existed Longer in 1992-93 Winter Quantum Mechanics and Beyond 1 Ron's Space Calendar? Russian Operation of US Space Missions. Space on other nets Starlite plastic can take 10000 degrees Celsius (3 msgs) Temp Station for Orbital Repair/Scrap! Update on weather satellite image archives What were "the other things"? Welcome to the Space Digest!! Please send your messages to "space@isu.isunet.edu", and (un)subscription requests of the form "Subscribe Space " to one of these addresses: listserv@uga (BITNET), rice::boyle (SPAN/NSInet), utadnx::utspan::rice::boyle (THENET), or space-REQUEST@isu.isunet.edu (Internet). ---------------------------------------------------------------------- Date: 14 Apr 93 14:09:54 From: Steinn Sigurdsson Subject: Apollo Training in Iceland Newsgroups: sci.space In article stephens@geod.emr.ca (Dave Stephenson) writes: henry@zoo.toronto.edu (Henry Spencer) writes: >In article stephens@geod.emr.ca (Dave Stephenson) writes: >>Some of the Astronauts trained near Sudbury in Ontario for that reason. they were in Iceland, presumably it was for training on volcanic >geological formations, which are everywhere in Iceland. >If they wanted superficial resemblance to moonscapes, they need not have >gone so far afield. Trips like that were motivated by the geological >history of the regions, not by surface appearance. I remember the press releases at the time (never trust what you read in the press), which I was reading in England, all mentioned about the 'lunar landscapes' around Sudbury. NASA supported research in Iceland to study the volcanic conditions and how they would affect the Apollo missions, but I do not know if they sent astronauts there. They did go to Iceland, I can't remember who, but I'm pretty sure the group included Armstrong. They walked around a relatively recent lava field on Reykjanes, either on or just outside the Navy base there, and I have a vague recollection they also went to a seriously desolate lava field up north. I believe the training included walking around in mock suits but this was a long time ago and my memory isn't what it used to be... | Steinn Sigurdsson |I saw two shooting stars last night | | Lick Observatory |I wished on them but they were only satellites | | steinly@lick.ucsc.edu |Is it wrong to wish on space hardware? | | "standard disclaimer" |I wish, I wish, I wish you'd care - B.B. 1983 | ------------------------------ Date: 14 Apr 93 14:34:03 GMT From: Mario Wolczko Subject: Comet in Temporary Orbit Around Jupiter? Newsgroups: sci.space,sci.astro,alt.sci.planetary Following the path of Shoemaker-Levy 1993e (even a crude approximation) with a program like Dance of the Planets should be fun -- but alas I do not have a copy of the elements. Could someone on the net send me a set? Thanks Mario Wolczko ______ Dept. of Computer Science Internet: mario@cs.man.ac.uk /~ ~\ The University uucp: mcsun!uknet!man.cs!mario ( __ ) Manchester M13 9PL JANET: mario@uk.ac.man.cs `-': :`-' U.K. Tel: +44-61-275 6146 (FAX: 6236) ____; ;_____________the mushroom project___________________________________ ------------------------------ Date: Wed, 14 Apr 1993 23:16:54 GMT From: Rob Douglas Subject: DC-X update??? Newsgroups: sci.space This question is probably mostly for Allen Sherzer, but anyone who KNOWS would be welcome to answer. I was just wondering if we could have some kind of update on DC-X. I have gathered that it is now outside. What are the expected acheivments of the first flight, the payload, and if you could, the future of the program based on a successful first flight? No need to tell us when it launches, thanks to Allen's .sig. thanks for the info ROB -- =========================================================================== | Rob Douglas | SPACE | 3700 San Martin Drive | | AI Software Engineer | TELESCOPE | Baltimore, MD 21218, USA | | Advance Planning Systems Branch | SCIENCE | Phone: (410) 338-4497 | | Internet: rdouglas@stsci.edu | INSTITUTE | Fax: (410) 338-1592 | =========================================================================== Disclaimer-type-thingie>>>>> These opinions are mine! Unless of course they fall under the standard intellectual property guidelines. But with my intellect, I doubt it. Besides, if it was useful intellectual property, do you think I would type it in here? -- =========================================================================== | Rob Douglas | SPACE | 3700 San Martin Drive | | AI Software Engineer | TELESCOPE | Baltimore, MD 21218, USA | | Advance Planning Systems Branch | SCIENCE | Phone: (410) 338-4497 | ------------------------------ Date: Thu, 15 Apr 1993 00:45:34 GMT From: Henry Spencer Subject: DC-X update??? Newsgroups: sci.space In article <1993Apr14.231654.14060@stsci.edu> rdouglas@stsci.edu (Rob Douglas) writes: >... DC-X. I have gathered that it is now outside. What are the >expected acheivments of the first flight, the payload, and if you could, >the future of the program based on a successful first flight? The first flight will be a low hover that will demonstrate a vertical landing. There will be no payload. DC-X will never carry any kind of payload; it is a technology demonstrator and experimental vehicle only. Its ceiling is circa 30,000ft and it is subsonic. If the DC-X part of the program is clearly successful, then comes the hard part: finding funding to build something more ambitious, e.g. something that might be able to reach orbit. -- All work is one man's work. | Henry Spencer @ U of Toronto Zoology - Kipling | henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: Wed, 14 Apr 1993 23:00:08 GMT From: "Phil G. Fraering" Subject: How to get there? (was Re: Comet in Temporary Orbit Around Jupiter? Newsgroups: sci.space,sci.astro,alt.sci.planetary higgins@fnalf.fnal.gov (Bill Higgins-- Beam Jockey) writes: >Eric Goold and Ron Baalke both gave rational explanations for this. >By the way, it sounds like breakup and non-gravitational forces have >nothing to do with the capture. They haven't gotten to my site yet, but I'll take your word for it. Although non-gravitational forces may have something to do with the capture. Remember that the comet has since broken up. >I guess what's bothering me is the phase space. The seat of my pants >(more politely known as "my physics intuition") tells me that a comet >must occupy a narrow range of velocities and >nearest-approach-to-Jupiter distances in order to end up being bound >to Jupiter. This seems like a very rare event, not something that >would be observed two or three times in a twenty-year period. Of >course, the seat of my pants has been wrong before. >If cometary capture is fairly common, the phase space must be bigger >than I think. I'd like somebody to tell me why. Offhand, I guess some sort of interaction with the jovian moons. I guess, as I said before, on whether or not said comet is in the plane of the system. >I have looked in a couple of U. Az. Press books but they refer me to >books and articles not handy in the Fermilab library. The problem is >connected to the origin of the Trojan asteroids. I note that some >experts on this have written a book: *Long-Term Evolution of >Short-Period Comets*, by Carusi, Kresak, Perozzi, and Valsecchi, >published in 1985 by Adam Hilger, Ltd. Remember the Firesign Theatre >radio station that broadcast "Morning Concert of Afternoon Showtime >Favorites?" Uh, period refers to the period of the *orbit.* It doesn't neccesarily have to be the length of time the comet lasts. I have that info at home somewhere in some notes (average lifetime of short period comet; or at least our best guess as to how long it sticks around before it doesn't look like a comet anymore). >I don't think my interest in this matter is large enough to drive into >Chicago to dig the answer out of a better library. This might change >if Brian Marsden announces that the thing is definitely captured and >will be around long enough for Galileo to take a peek at it! Then I >will have to explain cometary capture to all my friends and relatives. You're worse than all those college freshmen posting to the net about how they don't have time to look it up in the library. At least you have a car. >Bill Higgins, Beam Jockey | "I'm gonna keep on writing songs >Fermilab | until I write the song >Bitnet: HIGGINS@FNAL.BITNET | that makes the guys in Detroit >Internet: HIGGINS@FNAL.FNAL.GOV | who draw the cars >SPAN/Hepnet: 43011::HIGGINS | put tailfins on 'em again." > --John Prine -- Phil Fraering |"Seems like every day we find out all sorts of stuff. pgf@srl02.cacs.usl.edu|Like how the ancient Mayans had televison." Repo Man ------------------------------ Date: 14 Apr 93 21:08:28 GMT From: James Thomas Green Subject: Is Hubble looking at SN1993J? Newsgroups: sci.astro,sci.space.hubble,sci.space Is the Hubble Telescope looking at SN 1993J? /~~~(-: James T. Green :-)~~~~(-: jgreen@oboe.calpoly.edu :-)~~~\ | "You knew the job was dangerous when you took it!" | | | ------------------------------ Date: Thu, 15 Apr 1993 00:25:34 GMT From: dempsey@stsci.edu Subject: Is Hubble looking at SN1993J? Newsgroups: sci.astro,sci.space In article <1993Apr14.210828.121290@zeus.calpoly.edu>, jgreen@trumpet.calpoly.edu (James Thomas Green) writes: > > Is the Hubble Telescope looking at SN 1993J? > > Yes, I can confirm that HST is indeed taking some awesome data of 93J. More than that I perhaps should nto say. ____________________________________________________________________________ Robert C Dempsey (410) 338-1334 STScI-PODPS 3700 San Martin Dr. Baltimore, MD 21218 "If in the last few years you haven't discarded a major opinion or acquired a new one, check your pulse. You may be dead." G. Burgess ____________________________________________________________________________ ------------------------------ Date: 14 Apr 1993 20:40 UT From: Ron Baalke Subject: Ozone-Detstroying Chlorine Existed Longer in 1992-93 Winter Newsgroups: sci.space,sci.geo.meteorology Paula Cleggett-Haleim Headquarters, Washington, D.C. April 14, 1993 (Phone: 202/358-0883) James H. Wilson Jet Propulsion Laboratory, Pasadena, Calif. (Phone: 818/354-5011) RELEASE: 93-068 OZONE DESTROYING CHLORINE EXISTED LONGER IN 1992-93 WINTER Ozone-destroying forms of chlorine existed for much longer in the Arctic stratosphere this winter than last, say scientists. Northern Hemisphere ozone abundance also was observed to be some 10 percent below that measured during the same period last year, with some regions 20 percent lower. Using NASA's Upper Atmosphere Research Satellite (UARS), Dr. Joe Waters and his colleagues at the Jet Propulsion Laboratory (JPL), Pasadena, Calif., and Edinburgh University, Scotland, have collected daily maps of ozone and other gases and of temperature in different layers of the stratosphere. One of their most critical measurements is of chlorine monoxide, a form of chlorine that destroys ozone. They reported the results in the international scientific journal Nature. "Ozone concentrations in the Arctic in a layer about 12 miles (20 kilometers) high, where most chlorine monoxide was located, decreased by 0.7 percent per day from mid-February through early March 1993," Waters said. Ozone levels normally increase in this area at this time of the year, he added. Chlorine already in the stratosphere, from chlorofluorocarbons, is converted to ozone-destroying forms by chemistry occurring on clouds which form at low temperature. Last year, the scientists measured large abundances of chlorine monoxide in the Arctic, but the concentrations decreased after the stratosphere warmed in late January. This winter, the stratosphere remained cold through February, and chlorine monoxide remained abundant through early March. About as much chlorine monoxide was seen in the northern polar regions in February 1993 as was measured at the South Pole before the 1992 Antarctic ozone hole formed. "We do not see a well-defined area of ozone loss that could be described as an Arctic ozone hole," Waters said, "but the smaller abundances of ozone seen throughout the Northern Hemisphere this winter raise the question of whether the chlorine destruction of ozone has been spread over a wider area." Record low values of ozone also have been reported recently by the World Meteorological Organization and Environment Canada. The microwave limb sounder aboard UARS was developed and is operated by JPL, led by Waters and sponsored by NASA's Office of Mission to Planet Earth. Additional members are from Edinburgh University, Heriot-Watt University and the Rutherford-Appleton Laboratory in the United Kingdom. UARS, launched Sept. 12, 1991, aboard Space Shuttle Discovery, is managed by NASA's Goddard Space Flight Center, Greenbelt, Md. - end - EDITORS NOTE: A video and three color-map images are available by calling NASA Headquarters Broadcast and Imaging Branch on 202/358- 1900. The photo numbers are: Color B & W 93-HC-134 93-H-146 93-HC-135 93-H-147 93-HC-136 93-H-148 ___ _____ ___ /_ /| /____/ \ /_ /| Ron Baalke | baalke@kelvin.jpl.nasa.gov | | | | __ \ /| | | | Jet Propulsion Lab | ___| | | | |__) |/ | | |__ M/S 525-3684 Telos | Being cynical never helps /___| | | | ___/ | |/__ /| Pasadena, CA 91109 | to correct the situation |_____|/ |_|/ |_____|/ | and causes more aggravation | instead. ------------------------------ Date: Thu, 15 Apr 1993 00:26:06 GMT From: Jack Sarfatti Subject: Quantum Mechanics and Beyond 1 Newsgroups: sci.physics,rec.arts.startrek.fandom,rec.arts.sf.science,sci.space Will to Power in Post Quantum Physics The observer in standard linear quantum theory is basically passive in spite of what John Archibald Wheeler says about the "participator". The observer must stand helplessly by watching the wave function collapse randomly according to the Born interpretation. Here is this enticing quantum connection and we cannot even use it to communicate? This is not a happy state of affairs. In fact, I will not stand for it. It is obvious that nonlinear corrections beyond standard quantum mechanics are required to account for our free will, our ability to shape destiny, our rendezvous with the stars. Part of Jack Sarfatti's opening remarks to the first graduating class of Star Fleet Academy. ------------------------------ Date: 14 Apr 1993 20:42 UT From: Ron Baalke Subject: Ron's Space Calendar? Newsgroups: sci.astro,sci.space In article <1993Apr14.153536.1@ulkyvx.louisville.edu>, jsmill01@ulkyvx.louisville.edu writes... >I find that I am in need of Ron Baalke "Space Calendar". If anyone >has it on line, could you please send me a copy of it. > I keep the latest copy of the calendar in the pub/SPACE/FAQ directory at ames.arc.nasa.gov. ___ _____ ___ /_ /| /____/ \ /_ /| Ron Baalke | baalke@kelvin.jpl.nasa.gov | | | | __ \ /| | | | Jet Propulsion Lab | ___| | | | |__) |/ | | |__ M/S 525-3684 Telos | Being cynical never helps /___| | | | ___/ | |/__ /| Pasadena, CA 91109 | to correct the situation |_____|/ |_|/ |_____|/ | and causes more aggravation | instead. ------------------------------ Date: Wed, 14 Apr 1993 21:26:57 GMT From: Dennis Newkirk Subject: Russian Operation of US Space Missions. Newsgroups: sci.space,sci.astro In article <1qg0i3$fad@access.digex.net> prb@access.digex.com (Pat) writes: >COBE the Cosmic Background Explorer is planned for shutdown >THis year, because there is insufficient funds to keep it alive. > >Would it be possible for the soviets to Run it? > >PS for those interested, at GSFC, COBE costs appx $1 million a year >to run. Anyone know a science foundation that can pick up the tab?: A recent article said the Russians are making an appeal to those in cooperative projects (GRANAT was specificially noted - I think it was in Space News) to supply funding to enable the missions to continue. Yes, Russia, Ukraine and maybe Kazakstan have facilities and personnel to control satellites. To control modern US satellites they would almost certainly need new equipment (unless their intelligence folks are really good at 'spoofing' which is unknown to me). They would need people to tell them what to do with the satellites. Anyway, if you could cut the price by half, you would still have to find the other half to send to Russia, so you might save one project out of a few. Is it worth it? It would be nice to at least have the capability. Dennis Newkirk (dennisn@ecs.comm.mot.com) Motorola, Land Mobile Products Sector Schaumburg, IL ------------------------------ Date: Wed, 14 Apr 1993 23:05:06 GMT From: "Phil G. Fraering" Subject: Space on other nets Newsgroups: sci.space higgins@fnalf.fnal.gov (Bill Higgins-- Beam Jockey) writes: ... >Reply by e-mail, unless you think the answers would be of general >interest. If so, please forward them to me too. Unless you post. -- Phil Fraering |"Seems like every day we find out all sorts of stuff. pgf@srl02.cacs.usl.edu|Like how the ancient Mayans had televison." Repo Man ------------------------------ Date: 14 Apr 1993 20:21:37 GMT From: Henry Choy Subject: Starlite plastic can take 10000 degrees Celsius Newsgroups: sci.space,sci.materials This plastic, invented by Maurice Ward, is reported to standup well to the heat of nuclear flashes. Sounds like it could be good for spacecraft. -- Henry Choy choy@cs.usask.ca What do we explore now, Spock? How about the wild sorority girls of the planet Playtex? ------------------------------ Date: Wed, 14 Apr 93 21:48:52 GMT From: "gozdz,antoni s" Subject: Starlite plastic can take 10000 degrees Celsius Newsgroups: sci.space,sci.materials In article <1qhroh$qli@access.usask.ca> choy@dvinci.USask.Ca (Henry Choy) writes: >This plastic, invented by Maurice Ward, is reported to standup well >to the heat of nuclear flashes. Sounds like it could be good for It all depends how far you happen to be. And for how long. Take a brick and direct a plasma torch on it - it'll take the heat (a few thousand degrees C) for some time as well. >spacecraft. > In which I'd put all those who get excited by such BS. :) Guys, take a course in chemistry and thermodynamics instead of reading The Detroit Free Press and listening to noon pseudoscience crap on the radio. No, I repeat, no chemical bond will withstand 10,000C; it's only plasma that can exist under such conditions. At equilibrium. Tony Gozdz tony2@cc.bellcore.com ------------------------------ Date: Wed, 14 Apr 93 15:56:20 PDT From: Charlie Prael Subject: Starlite plastic can take 10000 degrees Celsius Newsgroups: sci.space,sci.materials choy@dvinci.USask.Ca (Henry Choy) writes: > This plastic, invented by Maurice Ward, is reported to standup well > to the heat of nuclear flashes. Sounds like it could be good for > spacecraft. Reading the AP news writeup on this stuff, it seems to work by diffusing instantaneous heat impulse throughout the plastic. In short, it's great stuff for stopping short-duration, high-tempurature stuff. How well it would work against longer-term heat sources is another question entirely. Then, well, there's also the question of how good an impact resistor it is. If it's brittle, you've got a problem, eh? ------------------------------------------------------------------ Charlie Prael - dante@shakala.com Shakala BBS (ClanZen Radio Network) Sunnyvale, CA +1-408-734-2289 ------------------------------ Date: Wed, 14 Apr 1993 20:52:37 GMT From: nsmca@ACAD3.ALASKA.EDU Subject: Temp Station for Orbital Repair/Scrap! Newsgroups: sci.space Here might be a sp;ution to the sattelite snagging problem.. Clarke Orbit, Van Allen Belt and such, its been said its not a good place for a space station. Why not a temporary space station. Inflatable or otherwise.. basically setup the temporary space station, have a vehicle to catch old sattelites and then broing them back to the temp space station for reuse, unless they can (satellites) be repaired onsite.. versus at the temp station. Once all the sattelites are repaired or recycled or whatever (the ones that are in need of repair or scraping) then go back to the permenant station and deflate/tear down or leave (?? possible) the temp in orbit.. If a satellite is to be scraped, juts deply some form of net and catch it and bring it in.. Why must there be a robotic arm?? other than to show that it can be done.. Michael Adams NSMCA@ACAD@.ALASKA.EDU I'm not high, just jacked ------------------------------ Date: Thu, 15 Apr 1993 00:09:37 GMT From: "Milo S. Medin" Subject: Update on weather satellite image archives Newsgroups: sci.space,sci.geo.meteorology Hi again. This is to update you on the status of our weather image data which is available for anonymous FTP. Again, We have set up a series of revolving archives in various places around the world and each of these revolving archives is synchronized to a master archive. Each revolving archive contains the last 4 days worth of images transmitted by the GMS satellite. The GMS satellite transmits 28 sets of images per 24-hour cycle. Of those, 24 are hourly observations and the other 4 are half-hourly observations made for the purpose of getting accurate wind-speed readings. Each set of images consists of two images: one IR and one VIS image. The IR images have a resolution of 5km while the VIS images have a resolution of 1.25km. Because of the large size of the VIS images, we are subsampling them down to a resolution of 5km; i.e., we have made the resolution match the native IR resolution. We will eventually provide full-resolution VIS imagery as well, but it will probably be a while. There is also a new data format available, composite-jpeg. In response to requests for smaller and lower resolution images which can be more easily viewed, and not true science-grade imagery, the folks at U of Hawaii have created a composite image of the IR and VIS data, with false color that actually does a fair job of representing what the spacecraft is actually seeing, even though the instruments don't support color transmissions directly. These images end up being about 848x848 and range from 30 Kbytes to 180 Kbytes in JPEG format. They are quite spectacular, and make great backgrounds! In fact, there is a pilot project going on now that multicasts these images in a near realtime fashion over the Internet MBONE network. You basically run a little tool locally on your Sparcstation, and it just sits back and reads the images coming in and updates your background whenever a new image arrives. It works really well, and I would expect the U of Hawaii people to make this available soon; maybe a in a month or so. Potential users should contact your campus network administrators for MBONE access. This eliminates the need for users to write scripts that constantly fetch the latest image. Also, a new east coast archive site has been made available, boa.gsfc.nasa.gov. This site is connected via a T3 line to FIX-East, and is closer to most European users. Work is underway to set up an archive in London for better European access. The explorer.arc.nasa.gov sites is a couple LAN hops away from FIX-West, and is very well connected to most users. This site also has the Magellan, Viking, and Voyager CD-ROM's available and online for anonymous FTP. Work is in progress to move to the ames.arc.nasa.gov space archives here as well. In summary, here are the current archives: explorer.arc.nasa.gov ~ftp/pub/Weather (FIX-West, Pacific Rim) boa.gsfc.nasa.gov ~ftp/Weather (FIX-East, Europe) plaza.aarnet.edu.au ~ftp/Weather (Australia only) All of them are identical in content and structure. The delay between images being received by us and their being available at all of these archives is generally no more than a few minutes. The directory structure in each place looks like the following: gms / \ \ ir vis composite-jpeg / \ / \ | hdf gif hdf gif jpeg There is also a doc directory that provides some background about what's going on. The intent is for the HDF files to contain true research quality data while the GIF files are meant to contain visually appealing data. Thus you should not expect the GIF files to contain research quality data. We *will* be enhancing - and thus adulterating - these files. But the HDF files are guaranteed to be unenhanced. The GIF files will likely be replaced with JPEG compressed versions to decrease the size and thus the transfer rate. Progress has been made on the navigation data, and more info should be posted soon in this area. Also, progress has been made on the GOES and METEOSAT front as well. Two ground stations, one for GOES-7 and the other for METEOSAT-3 (which covers the eastern US) have been ordered and will be installed at NASA Ames Research Center in the next 2 months or so. These datasets will then be made available at the same archive sites and formats as the GMS-4 data. And we are also looking at the possibility of getting some polar orbiter data as well, which should provide higher resolution images. However, there currently appears to be a problem with the spacecraft antennas on METEOSAT-3, and this may make obtaining high quality images nearly impossible. If we can't get any good data, then we obviously won't distribute it! We are open to any and all suggestions as to what you might want to see done. Our primary goal is to build a system that will allow for efficient distribution of very large collections of earth observation data across the network. We believe we have a solid handle on ``how", but we need to look to the end users for ``what". Torben Nielsen at U of Hawaii is the primary architect of the data collection and processing systems. Feel free to send he or I any questions or comments you have. He's torben@hawaii.edu, and I am medin@nsipo.nasa.gov. This work is sponsored by the University of Hawaii, the NASA Office of Mission to Planet Earth, and the NASA NREN project office. Thanks, Milo ------------------------------ Date: Wed, 14 Apr 93 22:25:44 GMT From: Ross Finlayson Subject: What were "the other things"? Newsgroups: sci.space Visiting the Kennedy Space Center recently, I got to hear once again a tape of President Kennedy's now-famous call for a manned lunar landing by the end of the 1960s. Later on in his speech, Kennedy says (quoting roughly): "We aim to put a man on the moon in this decade and do the other things, not because they are easy, but because they are hard!" Question: What were "the other things" that Kennedy referred to? I presume that these were other goals (in addition to the moon landing) that he had proposed earlier in the same speech. Can anyone remember what these were? Ross. ps. On the KSC tour we also get to hear President Reagan's call (in his 1984 state-of-the-union speech) for a "permanent manned space station", "operational within a decade". The fact that this far less ambitious goal has no chance now of being attained says a great deal about how the space program has changed. ------------------------------ End of Space Digest Volume 16 : Issue 460 ------------------------------