HDTenEightyP/NetNews huggingface dataset:
From: npearl@magnus.acs.ohio-state.edu (Nathan Y Pearlstein)
Subject: Full/New Moon Help!!!
Keywords: MOON
Organization: The Ohio State University
Date: Wed, 22 Jul 1992 04:36:25 GMT

Could some one please tell me what days the full and new moon occur in May 
1993?

I would really appreciate a speedy reply

thanks.
-- 
*  Nathan Pearlstein   npearl@magnus.acs.ohio-state.edu     Astronomy -gasp!  *
*  Sir Nathan Pearlstein     silly@camelot.uk.mil           Undergrad -GASP!! *
* "...We eat ham and jam and spamalot..."  - Knights of The Round Table Choir *
*        Beware lest the Slanneshi hordes pervert the Net    -- let them      *
From: martin@space.ualberta.ca (Martin Connors)
Newsgroups: sci.astro
Subject: Re: Update on Toutatis needed
Date: 31 Jul 92 14:48:53 GMT
Reply-To: martin@space.ualberta.ca (Martin Connors)
Organization: University Of Alberta, Edmonton Canada

In article <244900017@peg.pegasus.oz.au> nexus@peg.pegasus.oz.au writes:
> 
> There has been a rumour floating around that the asteroid Toutatis
> is going to be coming very close to the EArth.  Q.  Is there a
> likelihood of somebody posting an updated ephemeris? Please?
> Yours in anticipation.
The closest encounter will be Dec. 8 of this year. If anyone has an  
ephemeris would they be kind enough to include orbital elements in J2000,  
or better yet heliocentic coords/derivatives in J2000?

Martin Connors
Space Research
University of Alberta
From: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
Newsgroups: sci.astro
Subject: Re: On the formation of black holes
Date: 22 Jul 92 14:45:13 GMT
Reply-To: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
Organization: The Wistar Institute of Anatomy and Biology
In-reply-to: anderson@fermi.phys.ualberta.ca (Warren G. Anderson)

In article <1992Jul21.194850.25821@kakwa.ucs.ualberta.ca>, anderson@fermi (Warren G. Anderson) writes:
>In article <83854@netnews.upenn.edu> weemba@sagi.wistar.upenn.edu (Matthew P  
>Wiener) writes:

>> That the external observer sees infalling material disappear in a finite
>> time, contrary to what was believed three decades ago, because people
>> didn't yet understand the difference between time and t.

>In fact, this is not true for a classical source, at least, not if 
>"disappear" means "no emissions can reach a stationay observer".

What are you talking about?  An emission that takes a detour to another
planet first and then comes back?  When physicists were confused about
"frozen stars" hovering above the event horizon, they thought they were
talking about an essential phenomenon involving time, not mirror tricks.

>I finally got around to looking in the suggested section of MTW.

Thank you!  I'll repeat that for all of you: MTW, Chap 33.  Glorious and
amazingly clear.

>								  I guess I
>misunderstood what you were saying. What you say above is true. However,
>the stationary observer never does see anything cross the event horizon
>(which is what I was saying).

Well of course not.  We've been both saying that, but you were trying,
for some reason, to understand this in a Penrose diagram.

>			       It's simply that the intensity fall off due
>to the space-time curvature is so rapid that 'virtually' nothing 
>escaping from a test particle close enough to the event horizon reaches
>a stationary observer.

This is a separate issue.  The geometry of collapse alone suffices to
establish a cone of last influence.  Actually, geometry alone would say
that you could see that instantaneous moment of crossing, but I don't
think such notions are well-defined physically.

>		        Why didn't you just say this instead of saying
>that my argument using Penrose diagrams was going awry because I was
>using Schwarzschild time and such?

Uh, I kept saying over and over again that S-time was just a coordinate,
and not to be taken seriously without careful interpretation.  If it gets
through on the fifth try, great!

>				    In the end, it turns out we are both
>right, just talking about slightly different things. 

Yes.  My prejudice is for the primary geometrical explanation.  The
physical mechanisms of near-horizon emission play a supporting role.
-- 
-Matthew P Wiener (weemba@sagi.wistar.upenn.edu)
Newsgroups: sci.astro
From: jfrankli@nyx.cs.du.edu (Jim Franklin])
Subject: university optics widescan eyepieces
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Date: Thu, 23 Jul 92 17:54:04 GMT

anybody have any comments on the 32 mm widescan, especially in
comparison to wide field eyepieces from other companies ?

thanks in advance
jim

Newsgroups: sci.astro
From: schlegel@odin.unomaha.edu (Mark Schlegel)
Subject: Re: moon shepherding
Organization: University of Nebraska at Omaha
Distribution: sci
Date: Tue, 21 Jul 1992 21:31:14 GMT

fy@lucid.com (Frank Yellin) writes:


>Can someone out there explain in moderately simple terms how a planet's
>moon clears out a gap in a ring ("shepherding")?
>Gravity is an attractive process, so the moon should be pulling stuff into
>the gap, not pushing it out.  Intuitively obvious, put clearly wrong.

Frank, 

First of all, you are slightly mixing two concepts, shepherding usually 
refers to a pair of small moons containing a narrow ring between them
(the F ring is an example).  However you mention clearing a gap, which
usually results from a gravitational resonance.  Let's talk about the
resonance-- the gap is cleared because the period of a ring particle in
the gap region would be an integer fraction of the period of the moon
that clears the gap, say the orbital period in the gap P = (1/n)Pm where
Pm is the period of the moon and n is any integer (lower integers result 
in a stronger effect).  Notice that when the periods have this relationship
the ring particle is always closest to the moon on the same side of the 
planet, the pull of the moon on the ring particle repetitively tugs on
it into a slightly elliptical orbit and the ring particle spends less 
average time in the gap -- the gap on the whole is thinned.

Mark Schlegel
Univ. of Nebr. at Omaha
 

>Thanks in advance.
>-- Frank Yellin
>   fy@lucid.com
Organization: Penn State University
Date: Wed, 29 Jul 1992 14:56:26 EDT
From: <LXS117@psuvm.psu.edu>
Newsgroups: sci.astro
Subject: An Observation Question.

    I have a question about what we really see when we
look at the stars.  I know, for example that if you are
looking at the bright star Vega in the constellation
Lyra, you are seeing light which has traveled 26 light
years to earth.  However, how far are we actually seeing?
What is our real range of vision?
                          Thanks for enlightening me!

                          Lizabeth at PSU
From: bx372@cleveland.Freenet.Edu (Mr. Arthur J. Musgrove)
Subject: Nova /Cyg 1992
Reply-To: bx372@cleveland.Freenet.Edu (Mr. Arthur J. Musgrove)
Organization: Case Western Reserve University, Cleveland, OH (USA)
Date: Sun, 26 Jul 92 03:02:02 GMT

I was wondering if anyone out there is doing any research on Nova Cygni
1992....
						Peter ...
-- 
                       					AstroComp....
	         			Specializing in UNIX SECURITY
                                           For more info call PETER @
					         1-504-766-0113
Newsgroups: sci.astro,sci.space
From: wa2ise@cbnewsb.cb.att.com (robert.f.casey)
Subject: What happens to unused RTG power on space probes?
Organization: AT&T
Date: Fri, 24 Jul 1992 22:21:43 GMT

From time to time, I see reports on various space probes.  One of the topics
reported is power generation (from RTG's) and power consumption by the
probe's equipment.  As I (mis)understand it :-), an RTG generates an exact 
amount of power (declines over the years though).  If the RTG generates
700 watts, and the probe uses 600watts, what happens to the extra 100watts?
Does the RTG get hotter then if all 700 watts were used?  An RTG is based
on the radioactive decay of plutonium, which decays at some fixed rate
and generates power at some fixed rate.  So, what happens if I don't use
all the power?
Xref: sparky sci.astro:8475 rec.radio.amateur.misc:12952 rec.radio.shortwave:5982
From: oler@rho.uleth.ca (Cary Oler)
Newsgroups: sci.astro,rec.radio.amateur.misc,rec.radio.shortwave
Subject: Daily Solar Geophysical Data Broadcast for 29 July
Date: 30 Jul 92 03:25:02 GMT
Organization: University of Lethbridge

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 211, 07/29/92
10.7 FLUX=098.1  90-AVG=125        SSN=073      BKI=1221 1101  BAI=003
BGND-XRAY=B2.1     FLU1=7.6E+04  FLU10=1.1E+04  PKI=1221 1222  PAI=005
  BOU-DEV=008,016,016,007,006,007,004,009   DEV-AVG=009 NT     SWF=00:000
 XRAY-MAX= C1.4   @ 2312UT    XRAY-MIN= B1.3   @ 0120UT   XRAY-AVG= B4.4
NEUTN-MAX= +003%  @ 1310UT   NEUTN-MIN= -002%  @ 2250UT  NEUTN-AVG= +0.3%
  PCA-MAX= +0.3DB @ 1735UT     PCA-MIN= -0.8DB @ 1945UT    PCA-AVG= +0.0DB
BOUTF-MAX=55247NT @ 2359UT   BOUTF-MIN=55202NT @ 1741UT  BOUTF-AVG=55228NT
GOES7-MAX=P:+106NT@ 2100UT   GOES7-MIN=N:+001NT@ 0424UT  G7-AVG=+083,+042,+009
GOES6-MAX=P:+119NT@ 2206UT   GOES6-MIN=E:-009NT@ 1256UT  G6-AVG=+096,+004,+032
 FLUXFCST=STD:100,100,105;SESC:100,100,110 BAI/PAI-FCST=010,010,010/010,010,010
    KFCST=2234 1233 2234 2233  27DAY-AP=020,008   27DAY-KP=3554 2223 2231 2222
 WARNINGS=
   ALERTS=
!!END-DATA!!
Newsgroups: sci.astro
From: mehr@oskar.uchicago.edu (David Mehringer)
Subject: Re: SETI
Organization: Department of Astronomy and Astrophysics
Date: Thu, 23 Jul 1992 19:39:21 GMT

In article <1992Jul23.120836.14352@kth.se> TordM@VanD.PhySto.SE writes:
>
> Hello all,
>
>  is there anybody who know just HOW the SETI searches for signals? I mean,
>which stars do they scan, clusters, galaxies and so on? Which frequenses do
>they scan? How do they analyse the "noice" they get? Is there any FTP-site
>which have stored "noice" for public to take a look at? Maybe there are some
>good references around??
>
On this subject, there is an article in a recent issue of Monthy Notices
of the Royal Astronomical Society (Blair et al. 1992, MNRAS, 275, 105).
The authors used the Parkes radio telescope to search for signals emitted
at the so called "interstellar communications channel" frequency which
is equal to pi times the frequency of the 21 cm hydrogen line (this 
frequency happens to fall in C band, an often used band for radio
observations of natural celestial phenomena).  They looked at 166 stars
and 7 globular clusters.  The stars mainly range in spectral type from
late F to early K.  Most of the stars were less than 30 pc away.  The
3sigma detection limit was 2 Jy 
(1 Jy = 10**(-23) ergs/s/cm**2/steradian/Hz).  No signals were detected.
--
Dave Mehringer              | 
dmehring@smaug.aoc.nrao.edu |  I am not Herbert. 
National Radio Astronomy    |  
Observatory, Socorro, NM    |
Newsgroups: sci.astro
From: chaloux@mandolin.mitre.org (Dave Chaloux)
Subject: Comet Shoemaker Levy 1991a1
Reply-To: chaloux@mandolin.mitre.org (Dave Chaloux)
Organization: The MITRE Corporation, McLean, Va
Date: Tue, 21 Jul 1992 18:27:23 GMT

I finally got a chance to look at this one last night. Frankly, I was somewhat disappointed. It was only about 8.1 M +- .3 Mag. Comparison stars were 7.0 and 8.6. I used a 8" SCT. This is considerably dimmer than Astronomy Mag had
estimated but is in line with the brightness graph that Jost Jan put out.
It looked to be a 5' circular puff with a definitely brighter nucleas in the
center. I saw no sign of a tail. Observations were hindered by the fact that
the comet was placed in the worst part of the sky for light pollution from
my location (Washington D.C strikes again). Observations were also hindered
by below average transparency. I am almost certain that it would have appeared
larger if conditions had been better.

Has there been any internal structure or tail that could be seen on better
nights elsewhere?


Newsgroups: sci.astro
From: jsmill01@ulkyvx.louisville.edu
Subject: Re: Galaxy Formation
Organization: University of Louisville
Date: Tue, 28 Jul 1992 12:28:28 GMT

In article <1992Jul27.145212.2616@newstand.syr.edu>, gjstephe@rodan.acs.syr.edu (Greg J Stephens) writes:
> I would like to know what are the conjectured differences that
> cause a galaxy to become a spiral, elliptical or irregular.
> Thanks in advance.
> --
Well, according to one theory presented in a text I use for my intro. 
astronomy classes (Kaufman's "Discovering the Universe) the 
determining factor between getting a spiral vs. an elliptical may have 
to do with the initial rate and subsequent efficiency of star 
formation.  In the case of an elliptical, an efficient star formation 
rate leads to the great reduction of star-making material, meaning 
that there is not much material left to make future generations of 
stars.  A spiral is less efficient in its initial star formation, 
allowing the collapse of the protogalactic cloud to continue, 
eventually to form into a disk and central bulge.  Material trapped 
in the disk can then be used for future generations of stars.

As to irregulars, I believe collisions between galaxies, or mergers, 
or other disruptive event is responsible for changing what may have 
been a spiral or elliptical into an irregular.

As this is not my area of concentration, any enlightenment on the part 
of those who know more about it would be appreciated, also.

Scott Miller, Program Coordinator
Rauch Memorial Planetarium
University of Louisville
jsmill01@ulkyvx.louisville.edu
Newsgroups: sci.astro
From: gsh7w@fermi.clas.Virginia.EDU (Greg Hennessy)
Subject: Re: IAU Circulars
Organization: University of Virginia
Date: Thu, 30 Jul 1992 15:35:13 GMT

In article <1992Jul29.125008.1367@weigele.de>
schnuffi.weigele.de!martin (Martin Weigele) writes: 
#Are they accessible in electronic form, does anyone know?

Yes, but they cost money, just like the paper circulars. Brian Marsden
is the person to contact. I beleive his e-mail address is on the
bottom of each circular.




--
-Greg Hennessy, University of Virginia
 USPS Mail:     Astronomy Department, Charlottesville, VA 22903-2475 USA
 Internet:      gsh7w@virginia.edu  
 UUCP:		...!uunet!virginia!gsh7w
From: j.jahn@abbs.hanse.de (Jost Jahn)
Newsgroups: sci.astro
Subject: Sunspots at 29.07.1992.
Date: 30 Jul 92 18:56:06 GMT
Reply-To: j.jahn@abbs.hanse.de
Distribution: sci
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

Sunspots at 29.07.1992., 0 h UT.

No.    Pos.  Cl.  Ar.  Mag. SF  F  M  X
---------------------------------------
7232 16N 91W Cao  100   b
7238 21S 18E Cao  180   b
7240 13S 33W Hrx   10   a
7241 15N 43E Hsx   70   a
7242 18N 56E Hsx  170   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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From: youngs@ccu.umanitoba.ca (Scott D. Young)
Newsgroups: sci.astro
Subject: Re: Phobos2-probe UFO pic-pro and contra
Keywords: ufo
Date: 22 Jul 92 21:22:04 GMT
Organization: University of Manitoba, Winnipeg, Canada

In <14iiehINNbhr@darkstar.UCSC.EDU> banshee@cats.ucsc.edu (Wailer at the Gates of Dawn) writes:


>Ha!  The Xists will be picking you up first pink boy.
>-- 
>The Wailer at the Gates of Dawn              | banshee@cats.UCSC.EDU       |
>Just who ARE you calling a FROOFROO Head?    |                             |
>DoD#0667  "Just a friend of the beast."      | banshee@ucscb.UCSC.EDU      |
>2,3,5,7,13,17,19,31,61,89,107,127,521,607....| banshee@ucscb.BITNET        |

   Isn't this group moderated?  Can't we keep waste-of-time messages like
   this somewhere else?  (Like alt.alien.visitors?  :) :) :) for the humor-
   impaired).

Scott Young
youngs@ccu.umanitoba.ca
My employer doesn't let me have opinions, so please don't tell them!
From: cpyy@vax5.cit.cornell.edu
Newsgroups: sci.astro
Subject: Re: On the formation of black holes
Date: 21 Jul 92 08:50:31 EDT
Distribution: sci
Organization: Cornell University

I write:
>> It is evident that a "person" on the surface of a collapsing star
>> (a coordinate independent view) will view the collapse in a finite
>> amount of time.
 
Matthew Weiner writes:
> And I didn't contradict this.

So I must not have been stating \ital\complete\ital\ nonsense as
you said earlier?

I ask:
>> What is your exact argument?

Response:
> That the external observer sees infalling material disappear in a finite
> time, contrary to what was believed three decades ago, because people
> didn't yet understand the difference between time and t.
> 

I agree with this entirely.  The object absolutely falls into blackness
and non-visibility.  This is the crux of my statement.  Are you saying that
the external witness can "see" or in some way be affected the object
falling across the event horizon in non-infinite time?

And please, enough of this "crybaby" insinuation.  I am in no way even
remotely sad or worried.  I enjoy flames, but suggest that informative
counterarguments be placed in publication while the fun, but subscriber
bandwidth usurping statements be placed in the apropriate group or
private e-mail. 

-- 

Jon C. Russo
internet : cpyy@vax5.cit.cornell.edu
phone    : 607.277.3295
From: j.jahn@abbs.hanse.de (Jost Jahn)
Newsgroups: sci.astro
Subject: Sunspots at 27.07.1992.
Date: 28 Jul 92 18:54:13 GMT
Reply-To: j.jahn@abbs.hanse.de
Distribution: sci
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

Sunspots at 27.07.1992., 0 h UT.

No.    Pos.  Cl.  Ar.  Mag. SF  F  M  X
---------------------------------------
7232 15N 67W Cso   50   b    2
7236 18N 58W Axx   10   a    1
7238 21S 43E Dso  220   b    2
7239 13S 36W Bxo   10   b
7240 14S 08W Bxo   10   b
7241 15N 69E Hsx   60   a


No optical or x-ray flares yesterday observed.


 
--
------------------------------------------------------------------------------
ABBS AstroMail, the first and most popular German astronomical bulletin board
------------------------- for amateur astronomers ----------------------------
    + 49 5851 7896 / V.21, V.22, V.22bis, V.32, V.42, V.42bis and MNP5
    ------------------------------------------------------------------
From: billn@hpcvaac.cv.hp.com (bill nelson)
Newsgroups: sci.astro
Subject: Re: Structure of Time
Date: 29 Jul 92 19:16:49 GMT
Distribution: na
Organization: Hewlett-Packard Company, Corvallis, Oregon USA

terry@venus.sunquest.com (Terry R. Friedrichsen) writes:
: In article <1992Jul28.211456.25821@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com (bill nelson) writes:
: 
: Unfortunately, there are a few complete and utter fools who read the news
: and think that their obligation is to make life miserable for as many other
: people as possible.
: 
: In one case I am familiar with, a net.idiot called a poster's employer and
: threatened to precipitate an FBI investigation if the employer didn't take
: immediate steps to prevent the poster from using the net!  Other really nice
: acts, such as threatening letters to CEOs (who often have no concept of what
: the net is in the first place), or letters to the site postmaster or system
: manager demanding the user's removal from the system, also occur.

You must be talking about JP. I haven't seen a posting from his site in a 
long time - nor do I miss him and his alter egos.

: I wish to state, categorically and for the record, that *all* such activity
: is utterly reprehensible and totally uncalled-for!  If anyone reading this
: posting is one of the net.idiots who contacted what's-his-name's employer,
: GO AWAY!  The net doesn't want you, and the net *certainly* doesn't need you.

Agreed. Lambasting a person, on the net or by e-mail is one thing. I expect
that to happen to me, on occasion, when I post to a public forum. Contacting
an employer should only be considered if the person is totally abusive over
an extended period of time - such as the person you mentioned above.

: We're all representing ourselves and only ourselves in our postings.  Our
: employers have nothing to do with it.  If the few net.idiots would only
: understand that, we wouldn't have to waste bandwidth on disclaimers.

Disclaimers mean little or nothing, legally. 

: Unfortunately, the disclaimers are often necessary, as there are always a
: few people who just *won't* behave properly.

There are a few that will cause all the trouble they can, regardless of any
disclaimers. They couldn't care less who's views are represented by the
posting.

: And yeah, I wish he'd take his postings to alt.5yearold.babble, too; but
: complain to *him*.  Getting him in trouble at work is absolutely inappro-
: priate.

I agree, and that is all I did - albeit, by posting. I tried to respond to
some e-mail he sent me, but it bounced.

Bill
Newsgroups: sci.astro
From: hendry@helios.physics.utoronto.ca (Paul Hendry)
Subject: VW Cep - last chance
Followup-To: hendry@centaur.astro.utoronto.ca
Summary: invitation to join international photometric campaign
Keywords: photometry, observing
Organization: University of Toronto Physics/Astronomy/CITA
Date: Mon, 27 Jul 1992 21:24:27 GMT

An international observational campaign is being run from Aug 23 to Sept 6.
All amateur or professional astronomers with photometers are invited
to participate. Accuracy better than 0.02 mag. will be required.
Any spectroscopic data that could be contributed will be most helpful.
The target object will be the contact binary VW Cep, which has a 0.278 d period.
A multi-longitude study like this one is needed to determine whether
there are any cycle to cycle variations in the light curve of VW Cep.
I am co-ordinating the campaign, and will do most of the data reductions
and analysis. The analysis will be mainly in the form of maximum entropy
imaging of the starspots on VW Cep from the photometry (as well as from
line profiles to be obtained at the David Dunlap Observatory).
Any significant observational contributers will co-author a paper
which will be submitted to a major journal of astronomy summarizing
the results of the campaign. The data will be sent to the IAU archives.
So far, there are 2 sites in Canada (both at DDO), 2 sites in the USA
(one east, one west), 12 sites in Japan, 2 sites in Poland,
and one site in each of Hungary and Turkey who are
participating in the campaign. I would especially like to hear from
anyone in western Canada or western USA who could observe VW Cep at any time
during the campaign.

Please reply by e-mail if you wish to participate, or if you simply
wish to have more information about the campaign or about VW Cep.

Paul Hendry, (graduate student in astronomy department at UofT)
Newsgroups: sci.astro
From: naizer@rei2.uucp (jonathan naizer)
Subject: Binocular opinions wanted....
Date: Thu, 23 Jul 1992 20:31:00 GMT
Organization: REI
Keywords: binoculars

I'm interested in getting opinions on low-end binoculars. I have a pair of
cheap 7x35's that I'm wanting to replace. I don't want to spend a lot of
money as I just purchased three new eyepieces for my SCT. Orion has a pair of
multicoated binoculars for about $100. Has anyone used these before? Are they 
worth $100? I'm also debating about what size to get 10x50's or 7x50's. Which 
would be better for scanning the night skies? Ideally, I'd like some 10x70's,
but I don't think I could afford them right now....

Any comments would be appreciated...

   



:q

Newsgroups: sci.astro