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 ; Thu, 24 May 90 01:25:50 -0400 (EDT) Message-ID: <0aKr0xC00VcJAfvk4R@andrew.cmu.edu> Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Thu, 24 May 90 01:25:18 -0400 (EDT) Subject: SPACE Digest V11 #444 SPACE Digest Volume 11 : Issue 444 Today's Topics: Re: Endangered Squirrels Re: Voyager Update - 05/22/90 Re: Endangered squirrels Re: Image Repository Re: Terraforming Venus Re: What Voyagers are up to (long)(was Re: Voyager Update - 05/08/90) Re: NASA Headline News for 05/18/90 (Forwarded) Re: NASA Headline News for 05/22/90 (Forwarded) Image Repository Hipparcos Update Galileo Update - 05/23/90 COMPARISON OF PROBE TECHNOLOGY NASA Select TV ---------------------------------------------------------------------- Date: 23 May 90 11:45:04 GMT From: usc!cs.utexas.edu!ntvaxb!ac08@ucsd.edu Subject: Re: Endangered Squirrels I don't know about the rest of you, but if the squirrels on that mountain are like the rest of the squirrels I've seen, putting a bunch of academics up there might be the best thing to happen... I've never seen a university campus where the little buggers weren't taking over... Chad I ------------------------------ Date: 23 May 90 07:32:02 GMT From: bfmny0!tneff@uunet.uu.net (Tom Neff) Subject: Re: Voyager Update - 05/22/90 How many people, total, are operating Voyager now? Are we reading about the work of three people? ------------------------------ Date: 23 May 90 15:34:51 GMT From: uc!nic.MR.NET!hall!gbt@tut.cis.ohio-state.edu (Greg Titus) Subject: Re: Endangered squirrels In article <1990May23.002522.414@uoft02.utoledo.edu> fax0112@uoft02.utoledo.edu writes: >> >> [Statement by me that 100 red squirrels on 10,000 acres of >> Mt. Graham is too low a population density to make sense.] >> >... Your math is correct but on >what grounds do you make your breeding claim? As the squirrels seem >to have done ok so far I think your claim is absurd. They certainly are still there, which implies that they are successful breeders. But for successful breeding, they've got to find each other, which implies overlapping ranges. Squirrels have small ranges -- probably less than 5 acres per individual. And thereby hangs our tail ... ;-) at 100 acres per squirrel, they won't see each other often enough to successfully reproduce. I'm prepared to be (very)! surprised to learn that red squirrels range farther than any other kind by a factor of 100, but Occam's Razor says the more likely cause of the above quandry is that one or both of the estimates is way off -- either their range is much smaller or their population is much larger. Perhaps red squirrels are even harder to count than U.S. citizens??? :-) :-) greg -------------------------------------------------------------- Greg Titus (gbt@zia.cray.com) Ada Project Cray Research, Inc. Santa Fe, NM Opinions expressed herein (such as they are) are purely my own. ------------------------------ Date: 24 May 90 00:27:25 GMT From: uvaarpa!murdoch!astsun8.astro.Virginia.EDU!gsh7w@mcnc.org (Greg S. Hennessy) Subject: Re: Image Repository Daniel Freedman writes: #Does NASA (or anyone else) maintain a repository of images taken #by spacecraft? I am beginning to think this info should go into the frequently asked questions list. There is such a repository, named the National Space Science Data Center (NSSDC). They can be reached at: Request Coordination Office National Space Science Data Center Mail Code 633.4 NASA Goddard Space Flight Center Greenbelt, MD 20771 -- -Greg Hennessy, University of Virginia USPS Mail: Astronomy Department, Charlottesville, VA 22903-2475 USA Internet: gsh7w@virginia.edu UUCP: ...!uunet!virginia!gsh7w ------------------------------ Date: 24 May 90 03:47:00 GMT From: zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!metro!sunaus.oz!softway!peg!paua@tut.cis.ohio-state.edu Subject: Re: Terraforming Venus Forgive me, but what has this got to do with terraforming Venus ? Paua. ------------------------------ Date: 23 May 90 15:06:06 GMT From: frooz!cfa250!mcdowell@husc6.harvard.edu (Jonathan McDowell) Subject: Re: What Voyagers are up to (long)(was Re: Voyager Update - 05/08/90) From article , by HIGGINS@FNAL.BITNET (Bill Higgins-- Beam Jockey): > (Maybe one of our astronomer friends can explain these catalog designations?) OK, I gotta earn my keep somehow: * Mu Centauri Bright star in Centaurus, Bayer letter is Mu * HD 206165 Star in Annie Cannon's (ca. 1920) HD catalog, the standard catalog of moderately bright stars * HD 164284 Ditto * HD 217675 * HD 200120 * HD 120324 * HD 164284 * HD 212571 * EG165 Eggen and Greenstein white dwarf star. White dwarfs are faint in the visible but very bright in the extreme UV. * PKS2155-304 Parkes radio source; coordinates are RA = 21 55, DEC = -30.4 (1950). This source is a well known BL Lac object. A BL Lac object is a variety of quasar which varies rapidly and shows strong continuum without emission lines; current models suggest we are looking down the mouth of a jet of material travelling at relativistic speeds out of the quasar nucleus. * Markarian 509 One of the UV-bright galaxies found by Markarian and colleagues in Armenia. This well studied galaxy contains a Seyfert nucleus (small quasar) and is very bright in the far infrared. * NGC 7027 Nebula in the New General catalog; this one is a famous planetary nebula, the remnant of a low mass star. The core of the star remains at the center of the nebula, a hot proto-white dwarf which is EUV-bright. ------------------------------ Date: 23 May 90 22:33:47 GMT From: usc!cs.utexas.edu!news-server.csri.toronto.edu!torsqnt!lethe!tvcent!andrew@ucsd.edu (Andrew Cowie) Subject: Re: NASA Headline News for 05/18/90 (Forwarded) In article <49974@ames.arc.nasa.gov> yee@trident.arc.nasa.gov (Peter E. Yee) writes: >The Ulysses spacecraft ... As current propulsion systems are unable to >lift the spacecraft directly from Earth over the sun's poles, a sling-shot >trajectory around Jupiter will send the probe across the sun's equator in >February, 1995. I'm no expert at orbital mechanics, but how can Ulysses slingshot around Jupiter to get to a sun-polar orbit when it is taking Galileo 5 or so years and 3 slingshots to get to Jupiter? Does it have to do with the masses of the craft involved, or am I missing something important? -- Andrew F. Cowie at TVC Enterprises, Toronto, Canada uunet!mnetor!lethe!tvcent!andrew andrew@tvcent.uucp ------------------------------ Date: 23 May 90 03:46:06 GMT From: mtndew!friedl@uunet.uu.net (Steve Friedl) Subject: Re: NASA Headline News for 05/22/90 (Forwarded) > It appears after traveling from darkness to light, the sudden > heating of the solar panels causes them to slightly vibrate. > Controllers say it can be easily fixed. Does this mean "really fixed" or "compensated for by software" ? Steve -- Stephen J. Friedl, KA8CMY / Software Consultant / Tustin, CA / 3B2-kind-of-guy +1 714 544 6561 voice / friedl@vsi.com / {uunet,attmail}!mtndew!friedl What's Spaf gonna do if Purdue hires RTM? ------------------------------ Date: 23 May 90 21:53:58 GMT From: van-bc!ubc-cs!alberta!arcsun.arc.ab.ca!calgary!cpsc.UCalgary.CA!dan@ucbvax.Berkeley.EDU (Daniel Freedman) Subject: Image Repository Does NASA (or anyone else) maintain a repository of images taken by spacecraft? It would be interesting to have them available via FTP, both for education/enjoyment and for interesting test data for image processing research. I am thinking particularly of images taken by the Hubble Space Telescope (once they start coming in). Other images, such as the "family portrait" would be interesting too. Dan Freedman U. of Calgary Computer Science Dept., 403 220-7299 2500 University Dr. N.W., dan@cpsc.ucalgary.ca Calgary, Alberta, Canada. T2N 1N4 ------------------------------ Date: 23 May 90 20:42:00 GMT From: frooz!cfa.HARVARD.EDU@husc6.harvard.edu (Steve Willner, OIR) Subject: Hipparcos Update [Following is condensed from the April 1990 issue of Astronews, the ESA Astrophysics Division newsletter. The original article is by Michael Perryman of ESTEC.] On-board systems function well. Payload now fully commissioned and calibrated. Payload being used to determine spacecraft attitude and improve detector pointing. Lifetime predictions for solar arrays revised upward to 2.5-3.0 years. Longest eclipse in February/March was 105 minutes; batteries had 5 minutes of margin, so data completely unaffected. Data being acquired 55-60% of time through mid-March. Goldstone station now on-line, but data link from Goldstone to ESOC flaky. Expect efficiency 70-75% when problems solved, compared to 30% at start of mission and 90% if correct orbit had been achieved. Data analysis proceeding smoothly. "If the mission survives 3 years at current performance levels (useful data fraction, present data quality, etc.), the original astrometric (and hence scientific) goals (2 milli-arcsec for positions, parallaxes, and annual proper motions) could still be achievable." ------------------------------------------------------------------------- Steve Willner Phone 617-495-7123 Bitnet: willner@cfa Cambridge, MA 02138 USA Internet: willner@cfa.harvard.edu ------------------------------ Date: 24 May 90 00:00:42 GMT From: usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Subject: Galileo Update - 05/23/90 GALILEO MISSION STATUS May 23, 1990 The Galileo spacecraft is almost 96.7 million miles from Earth, and 98.5 million miles from the Sun. Its speed in solar orbit is more than 62,000 mph, and it has completed more than 382 million miles of the 2.4-billion-mile path to Jupiter. Health of the Galileo spacecraft continues to be excellent and stable. Spacecraft operational activities at present consist of sun-pointing, various tests and calibrations, and continued cruise-science data gathering on interplanetary fields, particles, and ultraviolet phenomena. _ _____ _ | | | __ \ | | Ron Baalke | baalke@mars.jpl.nasa.gov | | | |__) | | | Jet Propulsion Lab | baalke@jems.jpl.nasa.gov ___| | | ___/ | |___ M/S 301-355 | |_____/ |_| |_____| Pasadena, CA 91109 | ------------------------------ 1,, Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Received: from andrew.cmu.edu via trymail for space+@andrew.cmu.edu (->space-usenet+) (->ota+space.incoming) ID ; Wed, 23 May 90 20:57:20 -0400 (EDT) Received: from andrew.cmu.edu via qmail ID ; Wed, 23 May 90 20:56:47 -0400 (EDT) ReSent-Message-ID: Received: from vma.cc.cmu.edu by andrew.cmu.edu (5.54/3.15) id for space+; Wed, 23 May 90 20:56:24 EDT Received: from VMA.CC.CMU.EDU by vma.cc.cmu.edu (IBM VM SMTP R1.2.1) with BSMTP id 5411; Wed, 23 May 90 20:55:37 EDT Received: from UGA.CC.UGA.EDU by VMA.CC.CMU.EDU (Mailer R2.04) with BSMTP id 5410; Wed, 23 May 90 20:55:35 EDT Received: from UGA.CC.UGA.EDU by UGA.CC.UGA.EDU (Mailer R2.05) with BSMTP id 0116; Wed, 23 May 90 15:49:41 EDT Resent-Date: Wed, 23 May 90 15:49:26 EDT Resent-From: Harold Pritchett Resent-To: Space discussion group Received: from UGA.BITNET by UGA.CC.UGA.EDU (Mailer R2.05) with BSMTP id 9294; Wed, 23 May 90 15:21:59 EDT Received: from VMA.CC.CMU.EDU by UGA.CC.UGA.EDU (Mailer R2.05) with BSMTP id 8856; Wed, 23 May 90 15:00:43 EDT Received: from CMUCCVMA by VMA.CC.CMU.EDU (Mailer R2.04) with BSMTP id 2384; Wed, 23 May 90 14:03:34 EDT Received: from po2.andrew.cmu.edu by vma.cc.cmu.edu (IBM VM SMTP R1.2.1) with TCP; Wed, 23 May 90 14:03:32 EDT Received: by po2.andrew.cmu.edu (5.54/3.15) id ; Wed, 23 May 90 11:59:43 EDT Received: via switchmail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu; Wed, 23 May 90 11:59:37 -0400 (EDT) Received: from po2.andrew.cmu.edu via qmail ID ; Wed, 23 May 90 11:08:07 -0400 (EDT) Received: from po3.andrew.cmu  0, unseen,*** EOOH *** Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Received: from andrew.cmu.edu via trymail for space+@andrew.cmu.edu (->space-usenet+) (->ota+space.incoming) ID ; Wed, 23 May 90 20:57:20 -0400 (EDT) Received: from andrew.cmu.edu via qmail ID ; Wed, 23 May 90 20:56:47 -0400 (EDT) ReSent-Message-ID: Received: from vma.cc.cmu.edu by andrew.cmu.edu (5.54/3.15) id for space+; Wed, 23 May 90 20:56:24 EDT Received: from VMA.CC.CMU.EDU by vma.cc.cmu.edu (IBM VM SMTP R1.2.1) with BSMTP id 5411; Wed, 23 May 90 20:55:37 EDT Received: from UGA.CC.UGA.EDU by VMA.CC.CMU.EDU (Mailer R2.04) with BSMTP id 5410; Wed, 23 May 90 20:55:35 EDT Received: from UGA.CC.UGA.EDU by UGA.CC.UGA.EDU (Mailer R2.05) with BSMTP id 0116; Wed, 23 May 90 15:49:41 EDT Resent-Date: Wed, 23 May 90 15:49:26 EDT Resent-From: Harold Pritchett Resent-To: Space discussion group Received: from UGA.BITNET by UGA.CC.UGA.EDU (Mailer R2.05) with BSMTP id 9294; Wed, 23 May 90 15:21:59 EDT Received: from VMA.CC.CMU.EDU by UGA.CC.UGA.EDU (Mailer R2.05) with BSMTP id 8856; Wed, 23 May 90 15:00:43 EDT Received: from CMUCCVMA by VMA.CC.CMU.EDU (Mailer R2.04) with BSMTP id 2384; Wed, 23 May 90 14:03:34 EDT Received: from po2.andrew.cmu.edu by vma.cc.cmu.edu (IBM VM SMTP R1.2.1) with TCP; Wed, 23 May 90 14:03:32 EDT Received: by po2.andrew.cmu.edu (5.54/3.15) id ; Wed, 23 May 90 11:59:43 EDT Received: via switchmail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu; Wed, 23 May 90 11:59:37 -0400 (EDT) Received: from po2.andrew.cmu.edu via qmail ID ; Wed, 23 May 90 11:08:07 -0400 (EDT) Received: from po3.andrew.cmu ------------------------------ Date: 23 May 90 16:49:49 GMT From: m2c!wpi!horshac@husc6.harvard.edu (Matthew J Rosenwasser) Subject: COMPARISON OF PROBE TECHNOLOGY Does anyone know how the technology of the Pioneers, Voyager and Vikings compare with that of Magellan, Ulyesses, Galileo and the HST? Can it be considered next generation? Or are they the same basic things but outfitted for different missions? ------------------------------ Date: Wed, 23 May 90 19:55:42 CST From: David Young Subject: NASA Select TV I have seen quite a few articles lately that mention NASA Select TV. Is that available to general cable subscribers or only via satalite? If it is only available via satalite, are video tapes of some of the events available? I am long-time follower of NASA activities and would like to see some of the events that are presented on NASA Select TV and not on CNN or the other network news programs. Thanks in advance for any replies. - David ------------------------------ End of SPACE Digest V11 #444 *******************