HDTenEightyP/NetNews huggingface dataset:
From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Solar Geophysical Data Broadcast for 19 December
Organization: University of Lethbridge
Date: 20 Dec 92 09:26:19 GMT

NOTE: Equipment problems prevented full data from being collected.
      Inaccuracies exist with the x-ray, neutron, PCA, total field, and
      geosynchronous magnetometer data.

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 354, 12/19/92
10.7 FLUX=147.0  90-AVG=137        SSN=162      BKI=1021 2233  BAI=007
BGND-XRAY=B5.2     FLU1=3.8E+05  FLU10=9.9E+03  PKI=1011 2233  PAI=008
  BOU-DEV=12849,18208,19777,16717,13395,008,25187,025   DEV-AVG=-3113 NT     SWF=00:000
 XRAY-MAX= B5.8   @ 0001UT    XRAY-MIN= B5.8   @ 0001UT   XRAY-AVG= B5.8
NEUTN-MAX= +000%  @ 0005UT   NEUTN-MIN= +000%  @ 0005UT  NEUTN-AVG= +0.0%
  PCA-MAX= +0.0DB @ 0005UT     PCA-MIN= +0.0DB @ 0005UT    PCA-AVG= +0.0DB
BOUTF-MAX=55410NT @ 0001UT   BOUTF-MIN=55410NT @ 0001UT  BOUTF-AVG=55410NT
GOES7-MAX=P:+088NT@ 0001UT   GOES7-MIN=N:+008NT@ 0001UT  G7-AVG=+088,+030,+008
GOES6-MAX=P:+109NT@ 0001UT   GOES6-MIN=E:-008NT@ 0001UT  G6-AVG=+109,-008,+013
 FLUXFCST=STD:155,160,165;SESC:155,160,165 BAI/PAI-FCST=015,010,010/015,010,010
    KFCST=3333 3333 2233 2223  27DAY-AP=014,028   27DAY-KP=1124 4333 5554 3433
 WARNINGS=
   ALERTS=
!!END-DATA!!
From: combs@vaxr.llnl.gov
Newsgroups: sci.astro
Subject: Newport Glasss Service
Date: 14 Dec 92 17:44:05 GMT
Organization: LLNL_LIS

As the original poster of the recommendation of Newport Glass as a supplier of
ATM glass, I was a bit taken aback by the horror stories of botched orders. My
order from them was handeled no problem.  
I'm sure that though they have a large list in their catalog of various glass
shapes and sizes, they do not stock very many.  This is a low volume business!
Nonetheless, I am curious about the sample of customer satisfaction. If you
had ok service from them you wouldn't bother to mention it, bad service always
is mentioned.  So.....If you have ever dealt with Newport Glass, could you drop
me a line to say the service was great, good, ok, poor, terrible. I'll post a
summary. Thanks.         
Rich Combs                        combs@vaxr.llnl.gov

Newsgroups: sci.astro
From: doerfler@cbnewsf.cb.att.com (ronald.w.doerfler)
Subject: Re: Annual calendar of celestial events
Organization: AT&T
Date: Wed, 16 Dec 1992 16:49:53 GMT

In article <7460062@hpfcso.FC.HP.COM> ajs@hpfcso.FC.HP.COM (Alan Silverstein) writes:
>A typical question is, "why are the sunrise/set and twilight min/max
>dates not on the solstices?"  It is because of the "equation of time",
>that is, the Sun runs "early" or "late" due to the ellipticity of the
>Earth's orbit.  Of course, the solstices and equinoxes themselves drift
>about 1/4 day later per year (versus the calendar) until we throw in a
>leap day every fourth year to reset the calendar to them.


In this vein, I might mention that the Dec., 1992 issue of the American
Mathematical Monthly has a good article on the length of the day and 
the solstices.  An even better article, in my opinion, is referenced
in this article, and is from the same journal in 1990.  Actually, the
older article does a much better job of deriving the effect of the 
angle of the ecliptic to the equator, and the newer article of deriving
the effect of the ellipticity of the earth's orbit.  It turns out that
the ecliptic angle is the dominant effect.  If you want the actual
equations that define the Equation of Time, these are the places to
find them.


Ron Doerfler


Newsgroups: sci.astro
From: j.jahn@abbs.hanse.de (Jost Jahn)
Newsgroups: sci.astro
Subject: Sunspots at 17.12.1992.
Reply-To: j.jahn@abbs.hanse.de
Date: 17 Dec 92 19:45:00 MET
Distribution: sci
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

Sunspots at 17.12.1992., 0 h UT.

No.    Pos.  Cl.  Ar.  Mag. SF  F  M  X
---------------------------------------
7360 19S 62W Dao  190   b    3
7362 06S 76W Dko  570   b
7363 09S 33W Cao   50   b    1
7364 08N 37W Hsx   50   a
7366 11S 09W Cro   20   b
7368 32S 10E Dao   60   b
7369 05S 41E Axx    0   a
7370 08S 53E Hsx   80   a
7371 10S 25W Bxo   10   b


No optical or x-ray flares yesterday observed.


 
--
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Newsgroups: sci.astro
From: chris@chrism.demon.co.uk (Chris Marriott)
Subject: Re: Solar Telescope Algorithms 
Distribution: world
Organization: None
Reply-To: chris@chrism.demon.co.uk
X-Mailer: Simple NEWS 1.90 (ka9q DIS 1.19)
Date: Wed, 16 Dec 1992 19:24:43 +0000

In article <1glcq9INN7f2@fnnews.fnal.gov> berman@fndaug.fnal.gov writes:

>hi, i am working on designing a solar tracking telescope for an interactive
>museum in aurora illinois (35 miles west of chicago).  i am interested in
>knowing if anyone has information on where i can find the algorithms that
>are used to follow the position of the sun.  i think these would take position
>on the earth and time, date and year and calculate the position of the sun
>for that time, date etc.  any books or articles would be helpful.
>
>thanks a bunch
>eileen
>(the actual physical design is done and in the process of being built)
>
>
>
>

I would recommend that you get hold of the book "Astronomical Algorithms",
by Jean Meeus, published by Willman-Bell.  You'll find all the information
you need in there.

Chris
-- 
--------------------------------------------------------------------------
| Chris Marriott                           | chris@chrism.demon.co.uk    |
| Warrington, UK                           | BIX: cmarriott              |
| (Still awaiting inspiration              | CIX: cmarriott              |
|  for a witty .sig .... )                 | CompuServe: 100113,1140     |
--------------------------------------------------------------------------
From: d.bublitz@abbs.hanse.de (Dieter Bublitz)
Newsgroups: sci.astro
Subject: Re: lunar eclipse behind clouds in germa
Reply-To: d.bublitz@abbs.hanse.de
Date: 12 Dec 92 01:49:00 MET
Distribution: sci
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

From : d.bublitz@abbs.hanse.de (Dieter Bublitz)
Subject : lunar eclipse behind clouds in germany


In article <ROTH.92Dec10164051@sun.ph-cip.uni-koeln.de>  
ROTH%PH-CIP.UNI-KOELN.DE wrote:

 > Hello,

 > I tried to look for the lunar eclipse, but there opened no hole in the clouds.
 > Did anybody in Germany or mid-europe see the eclipse?

 > Daniel

Not a glimpse of the moon here in southern Bavaria. This was a _real_ dark
eclipse. :-)
--
Dieter Bublitz, Keltenstrasse 13 , W-8072 Manching, Germany
Tel: [+49] 8459 7754        e-mail: d.bublitz@abbs.hanse.de
!! MsgBase 1.6h

--
------------------------------------------------------------------------------
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------------------------- for amateur astronomers ----------------------------
    + 49 5851 7896 / V.21, V.22, V.22bis, V.32, V.42, V.42bis and MNP5
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Newsgroups: sci.astro
From: andromed@cs.dal.ca (Mike Boschat)
Subject: Comets info ?
Organization: Math, Stats & CS, Dalhousie University, Halifax, NS, Canada
Date: Fri, 18 Dec 1992 19:40:51 GMT


  Hello;

 I have not seen the comet, asteriod, data by Johst and was wondering if it
was late appearing or did something happen while I was in the hospital
to that service ?
 Thanks in advance..



						Clear skies

						Mike Boschat

                                          andromed@sleet.atm.dal.ca
 ---------------------------------------------------------------------------
|                                   |  "Our problems are man-made,          |
|        JOHN F. KENNEDY            | therefore they can be solved by man " |
|                                   |                                       |
|   ASTRONOMICAL  OBSERVATORY       |                 J.F.K.                |
|                                   |                                       |
 ---------------------------------------------------------------------------                                                                     
          
            
            
            
            





  
                
Newsgroups: sci.astro
From: LINSCOT@RICEVM1.RICE.EDU (Stephen M. Linscott)
Subject: Re: Info wanted on '93 Texas Star Party
Organization: Rice University  
Date: Mon, 14 Dec 1992 19:53:29 GMT

In article <VpS=Hm-@engin.umich.edu>
hillig@U.Chem.LSA.UMich.EDU (Kurt Hillig) writes:
 
>
>Does anybody out there know the dates and/or contact person for the
>'93 Texas Star Party?  If so, please post!
>
 
The TSP dates are May 16-22  (Sun through Sat).  The TSP Registrar is
 
                 Bobby Brailey
                 P.O. Box 386
                 Wylie, TX  75098
 
Some people will arrive Saturday, but the Ranch is usually not blacked-out
until Sunday nite.
                                  - Steve -
 
>--
>      Kurt Hillig
>   Dept. of Chemistry      I always tell the     khillig@umich.edu
> University of Michigan     absolute truth    Telephone (313)747-2867
>Ann Arbor, MI  48109-1055    as I see it.    hillig@chem.lsa.umich.edu
From: jcj@tellabs.com (jcj)
Subject: Re: Buying mail-order from camera stores
Organization: Carl Pellonpaa Fan Club - South Chapter
Date: Thu, 17 Dec 1992 14:25:27 GMT

David R. Smith writes:

>We have heard some horror stories about buying astronomical stuff from New
>York camera stores, among others.  Does anyone have an opinion on Shutan
>Camera and Video in Chicago? 

I've never ordered anything from them since I live about 45 minutes
away, but I've had pretty good camera service in-store.  They've
been in business for quite a long time. 

#include "std.disclaimer"
From: rbunge@access.digex.com (Robert Bunge)
Newsgroups: sci.astro
Subject: Re: ATM Materials
Date: 15 Dec 1992 17:26:56 GMT
Organization: Express Access Online Communications Service, Greenbelt, Maryland USA
NNTP-Posting-Host: access.digex.com

In article <1992Dec12.102732.28518@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com (bill nelson) writes:
>: Several people have said that 'plain'glass makes a better tool than pyrex. Could
>: you please expand on you comment.
>
>Glass is a lot cheaper than pyrex - but you want to use plate glass. It is
>not better, except in regards to cost.  Pyrex is better as far as expansion
>characteristics go.  However, by the time it would matter much, you are to
>the stage where the tool is covered with a pitch lap. 
>
I've noticed also that the mirror "hoggs" out faster if the tool is a
different material than the mirror.  "hoggs" out means that the rough
grinding goes faster and the mirror reaches the desired curve faster.
I remember some machinist telling me years ago that you always want
to grind hard against soft, never hard against hard, soft on soft 
(call Pyrex hard, glass soft).  Nonetheless, I've used the W-B kits
a good bit and the pyrex on pryex works fine.

Bob Bunge
rbunge@access.digex.com



Newsgroups: sci.astro
From: casey@stars.gsfc.nasa.gov (Sean Casey GSFC (301)286-4558)
Subject: Re: Night Lights
News-Software: VAX/VMS VNEWS 1.4-b1  
Organization: NASA/GSFC-Laboratory for Astronomy and Solar Physics
Distribution: na
Date: Sat, 12 Dec 1992 08:13:00 GMT

In article <1992Dec9.105556.1@stsci.edu>, hathaway@stsci.edu writes...
>Have most people seen the TV coverage of the US Forces landing in Somalia? 
>I was immediately struck by the stupidity of the use of bright white lights 
>in a night operation.  My earnest respect for the soldiers for not 
>summarily shooting out the cursed lights - though I think they would have 
>been more than justified.  
> 
>I am much encouraged that this inappropriate use of artificial lighting 
>was noticed by others.  To quote from today's Washington Post, 
>" 'A lot of people are mad', said Lt. Cmdr. Joe Gradisher, a Pentagon 
>spokesman, 'The white light of the cameras just totally destroy night 
>vision.  Our forces are practically blind.' " 
> 
>Elsewhere, "Pentagon officals last night expressed anger at the news 
>media's intrusiveness, in particular the use of bright television 
>lights that they said could temporarily blind reconnaissance troops, 
>helicopter pilots and others using night-vision goggles." 
> 
> 
>WHH 

What the hell does this say about night-vision system? - SC

Newsgroups: sci.astro
From: palmer@sfu.ca (Leigh Palmer)
Subject: Re: The Hole Story
Organization: Simon Fraser University
Date: Thu, 17 Dec 1992 20:26:17 GMT

In article <1992Dec17.141835.1510@cs.ucf.edu> clarke@acme.ucf.edu (Thomas
Clarke) writes:

>Mathematically, I think, when you resolve a stationary field into
>a superposition of progagating waves you get a summation of
>retarded and advanced solutions so that action from the 
>"true, instantaneous position" is kind of an artifact....

This is, perhaps, the most extreme possible denial of what used to
be considered desirable in physical theory; it was called "elegance".
You are proposing to discard this simple, static field because it
seems to you to be an ad hoc add-on to a wave theory, but you are
willing to acknowledge another bit of really ugly ad-hocery in the 
very same paragraph:

>                                                      ...When 
>something changes, only the retarded solutions propgagate and
>thus radiation appears to comes from only the retarded position.  
>Why only retarded solutions? - ask the philosophers :-)

For heaven's sake, take off your blinders!

Leigh
Newsgroups: sci.astro
From: palmer@sfu.ca (Leigh Palmer)
Subject: Re: Earth's Orbit if no other planets
Organization: Simon Fraser University
Date: Tue, 15 Dec 1992 17:18:21 GMT

In article <9212150607.AA09164@cpsnet2.cps.edu> DAVID_JOHNSON@cpsnet2.cps.edu
writes:
>One of the people at work and I were having a discussion of astronomy
>vs.  astrology, and the subject of the Earth's orbit came up. 
>Specifically, this person believed that if there were no other planets
>in the solar system, then the Earth would have a different orbit than it
>does now.  We were discussing various scenarios, and considered both all
>other planets being removed from the existing configuration, and the
>formation of Earth by itself.  I disagreed that the orbit would be any
>different, giving the same mass of the Earth and Sun, and all other
>factors other that the existence of the other planets would remain the
>same.

I hope you recognize that this is not a scientific question.

>I was arguing on the side of astronomy, as he believes that astrology
>does have some reality to it, specifically in the area of the other
>planets influencing people here.
>
>Comments?

He's probably wrong, but this is not the season to disabuse people of
their religious delusions. After New Years Day ask him to make some 
quantitative predictions and check them out.

Leigh

"Remember that the man whose birth we celebrate this season died a virgin."
                                                         -me
From: ajs@hpfcso.FC.HP.COM (Alan Silverstein)
Date: Wed, 16 Dec 1992 01:31:37 GMT
Subject: Annual calendar of celestial events
Organization: Hewlett-Packard, Fort Collins, CO, USA
From: dillman@vf.jsc.nasa.gov
Subject: Re:Purchasing a portable telescope
Organization: NASA Johnson Space Flight Center
Date: 16 Dec 92 09:18:23 -0600



A few tips on the C-90:

1. An altazimuth mount is fine for a C90.  However, for either altazimuth or
equatorial, make sure you have a *stout* mount.  The way the C90 is focused is
by rotating the whole front end of the main tube.  This puts a lot of torque on
the tube and mount, and with a wimpy mount you end up looking at Timbuktu after
trying to focus.  

2. My C90 is 1982 vintage, which was before Cele offered the optional
multicoating.  When looking at bright planets at low power (35-55x), I get some
serious secondary reflections.  These are cleared up with a filter or going to 
higher power.  I don't know if the new optional multicoating helps this
problem, but it couldn't hurt.

3. The C90 finder is a 5x24 which is basically useless in a light polluted
environment.  I can't even find M31 in it from my urban backyard.  It appears
that a Meade #637 6x30 finder & mount may fit the C90 without redrilling the
tube, but I haven't been down to the local scope shop to do a fit check yet.

These may sound like a lot of gripes, but overall, I've been happy with the
C90.  When you pack this much telescope into something the size of a can of
beans, it just takes some sorting out to understand how to use it best.
-------------------------------------------------------------------------------

Dennis Dillman - I'm a new computer illiterate on the net, so this ain't
                 gonna be fancy!
-------------------------------------------------------------------------------
From: bscott@lyman.pppl.gov (Bruce Scott)
Newsgroups: sci.astro
Subject: Re: Communication through Event Horizon possible
Date: 14 Dec 92 23:11:48 GMT
Reply-To: bscott@lyman.UUCP (Bruce Scott)
Organization: Princeton University, Plasma Physics Laboratory

gallim@stsci.edu (Jack Gallimore,P254) writes:

>From article <1505@lyman.pppl.gov>, by bscott@lyman.pppl.gov (Bruce Scott):

>> Your last sentence is correct, so that preceding it is impossible
>> (if the sender has already passed the horizon). From the standpoint of an
>> external observer it takes an infinite time for something on a null
>> geodesic to travel from the horizon to the observer. Travel on any geodesic
>> from inside the horizon is impossible (in Einstein GR, of course).

>Right, that was rather the idea; I was just giving my understanding of what
>the previous poster was trying to say.  But you did say something I didn't
>follow.  I thought that there simply was no null geodesic from the event
>horizon to the observer.  I was always led to believe that a photon emitted
>at the event horizon could at best simply "orbit" if it were sent in 
>the right direction.  Could you clear this up?  My GR was a while back
>and I'm very rusty.

There is a "light circle" which is some numerical factor times the
Schwarzchild radius (where the event horizon is) from the singularity.
At that radius, photons can be put "in orbit". The orbit is unstable,
however, any deviation out and the photon escapes, any deviation in
and the photon falls ever inward. At any distance, there is a "light
cone" within which photons emitted escape. Relative to a radial vector
outward from the singularity, the light cone is 90 degrees wide at the
light circle, and 0 degrees wide at the event horizon. There is a null
geodesic from the horizon to the observer, but it emerges from negative
infinite time in the observer's frame. There are no null geodesics
(except some mathematical pathologies) from *within* the event
horizon to outside observers.

All this is for Schwarzchild black holes -- rotation zero. For both this
case and the rotatin case, I suggest reading:

Shapiro and Teukolsky, The Physics of Compact Objects (one chapter)

Rindler, Essential Relativity (one section of one chapter)

Ohanian, (relativity text, title forgotten, has plots of things I refer
    to, including the pathologies).

Good luck.
-- 
Gruss,
Dr Bruce Scott                             The deadliest bullshit is
Max-Planck-Institut fuer Plasmaphysik       odorless and transparent
bds at spl6n1.aug.ipp-garching.mpg.de                 -- W Gibson
From: j.jahn@abbs.hanse.de (Jost Jahn)
Newsgroups: sci.astro
Subject: Sunspots at 14.12.1992.
Reply-To: j.jahn@abbs.hanse.de
Date: 14 Dec 92 19:09:00 MET
Distribution: sci
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

Sunspots at 14.12.1992., 0 h UT.

No.    Pos.  Cl.  Ar.  Mag. SF  F  M  X
---------------------------------------
7355 19S 62W Hsx   50   a
7360 19S 22W Eao  370   b
7362 06S 36W Eki  530   b    3
7363 08S 06E Dao  110   b
7364 09N 03E Cso   50   b
7365 23S 51W Axx    0   a
7366 12S 32E Cao   60   b    5
7367 18S 35W Axx   10   a
7368 34S 51E Axx   10   a


No optical or x-ray flares yesterday observed.


 
--
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------------------------- for amateur astronomers ----------------------------
    + 49 5851 7896 / V.21, V.22, V.22bis, V.32, V.42, V.42bis and MNP5
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Newsgroups: sci.astro
From: det@phlan.sw.stratus.com (David Toland)
Newsgroups: sci.astro
Subject: Re: Refraction (was Re: Lunar Eclipse: umbra boundary?)
Date: 11 Dec 92 17:28:53 GMT
Organization: Stratus Computer, Software Engineering
NNTP-Posting-Host: phlan.sw.stratus.com

In article <1992Dec11.155749.15770@cs.rochester.edu> dietz@cs.rochester.edu (Paul Dietz) writes:
>In article <1992Dec10.235438.1398@athena.cs.uga.edu> mcovingt@aisun3.ai.uga.edu (Michael Covington) writes:
> >Even without diffraction, the edge of an umbra is by nature not sharp.
>
>Moreover, "diffraction" has nothing to do with it anyway!
>*Refraction* is what happens; sunlight gets bent slightly passing
>through the atmosphere, because the atmosphere's refractive index
>changes with altitude (this same effect shifts the time of sunrise
>and sunset slightly).

In terms of the "reddening" along the umbral edge mentioned earlier,
the other factor involved is dispersion, the preferential scattering
of the shorter wavelengths that leaves the transmitted portion
enriched in the longer (redder) wavelengths, due to suspended particles
in the atmosphere (dust, ice crystals, etc).

Example: put a few of drops of milk in a clear class of water, shine
a light through it.  From the side, the beam path looks bluish, and
looking into the beam from its exit it looks reddish or brownish.
This effect is why the sky is blue and sunsets/sunrises are red.

(Apologies to everyone for whom this is basic knowledge.)

-- 
--------------------------------------------------------------------------
All opinions are MINE MINE MINE, and not necessarily anyone else's.
det@phlan.sw.stratus.com   |  "Laddie, you'll be needin' something to wash
                           |  that doon with."
Newsgroups: sci.astro,rec.radio.shortwave
From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Solar Geophysical Data Broadcast for 13 December
Organization: University of Lethbridge
Date: 14 Dec 92 18:46:39 GMT

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 348, 12/13/92
10.7 FLUX=173    90-AVG=134        SSN=184      BKI=2412 2211  BAI=008
BGND-XRAY=B6.2     FLU1=1.4E+06  FLU10=9.6E+03  PKI=2312 2221  PAI=007
  BOU-DEV=***,***,006,011,010,***,***,006   DEV-AVG=008 NT     SWF=00:000
 XRAY-MAX= C2.7   @ 1045UT    XRAY-MIN= B6.1   @ 2221UT   XRAY-AVG= B9.6
NEUTN-MAX= +002%  @ 2315UT   NEUTN-MIN= -002%  @ 1055UT  NEUTN-AVG= +0.3%
  PCA-MAX= +0.1DB @ 2245UT     PCA-MIN= -0.5DB @ 1425UT    PCA-AVG= -0.0DB
BOUTF-MAX=55421NT @ 1415UT   BOUTF-MIN=55395NT @ 1909UT  BOUTF-AVG=55411NT
GOES7-MAX=P:+113NT@ 1818UT   GOES7-MIN=N:+007NT@ 1245UT  G7-AVG=+095,+027,+011
GOES6-MAX=P:+134NT@ 1817UT   GOES6-MIN=E:-014NT@ 2359UT  G6-AVG=+113,-005,+036
 FLUXFCST=STD:175,175,175;SESC:175,175,175 BAI/PAI-FCST=007,005,005/010,010,010
    KFCST=2223 3322 2223 3222  27DAY-AP=007,006   27DAY-KP=3122 2222 2321 2221
 WARNINGS=*SWF
   ALERTS=**245STRM:0114-0333UTC
!!END-DATA!!
Newsgroups: sci.astro