Sirs
I have discovered that an e-mail account was missing from my upgrade at New
Year and have not received sundial newsgroup messages.
This is the last one received.
If I have been deleted from the list due to non delivery I would ask if you
could kindly add back my address and apologies for any
I thank you for the information, and for the sources of information.
I've never waited more than one night for the Sun to return, so I can't imagine the feeling watching the sunrise for the first time in days, weeks or months!
Enjoy,
Albert Franco
35N 95W
Oklahoma, USA
Then to tides:I have been o
I have a question for those on this list with more experience (just about anyone!):
What would happen if a mirror were used not to reflect the sun's image, but as the dial itself?
As a kid, I had a mirror with an engraving of a deer on it in my room. I used to like to play with a flashlight
It seems that as Roger said it would make the base slanted at a cockeyed angle. And intuitively I'm not sure the hour lines would stay in the proper alignment with the shadow planes. The west side would start to rise and it seems that the shadow planes of each hour would cut through the face/b
http://home.iae.nl/users/ferdv/shadow1.htm
My understanding is that the ground doesn't have to be level, and can even be varying, which is a plus. Also, it is an interactive dial, and instructional.
Many thanks to Mac Oglesby for telling me about shadow planes. My own understanding of sund
Thanks,
AlbertMac Oglesby <[EMAIL PROTECTED]> wrote:
Hello Albert, et alAlas, a dial such as the one you refer to won't work at all well at such a low latitude. Spend a moment or two with your favorite sundial program and you'll see why.Best wishes,Mac Oglesby>I assume there is a building or p
It seems to me that the dial would have to be horizontal for Southern Hemisphere, or mounted lower than a human head so it could be viewed. The conical shape of the face is facing upward (if vertically mounted), so it couldn't be read if the sundial were mounted higher than a human head.
The
Allow me an off-topic question please - is there any way to obtain the
messages within this group as a daily 'digest' format as with other mailing
lists?
Thank you
Alex
-
Happy new year everyone!
First: I celebrate the new year by adding two English pages to my Norwegian
sundial site: http://nordnorsk.vitensenter.no/himmel/solursida/eng/.
Then to tides:
I have been off line for a while and during this time there have been some
discussions on tides on the list.
As you'll probably know, if we couple on the same device
a pair of sundials (of different kinds), not only they show solar
time but also the meridian line because the couple is self-orienting.
Do you know under which conditions this also holds for bifilars?
I guess that we just need a pair of
As you'll probably know, if we couple on the same device
a pair of sundials (of different kinds), not only they show solar
time but also the meridian line because the couple is self-orienting.
A standard horizontal bifilar dial has exactly the same sheaf of hour lines
as a common horizo
Somewhat off topic, but how do you translate (a) the right ascension of a
star and (b) the current date and time into (c) the apparent longitude of
the star?
-
If by longitude you mean the (western) geographical longitude of the
star, you may also use
the following approximation ( it comes
Dear Anselmo:
thanks for the approximation. How close is it? And is UT the time at
Greenwich?
Regards, Brad
Yes. UT is Greenwich Mean Time. As regards to the exactness and if I
remember well, it's
reliable in about 4min of time, that is, +/- 1 deg in longitude. I'll
try and check it.
An
On 12/1/04 12:50 pm, "tony moss" <[EMAIL PROTECTED]> wrote:
> Fellow Shadow Watchers,
>In common with many others these days I receive
> about 90% 'spam' with my email. Much of it is predictable rubbish but
> I'm puzzled by the number of totally blank and gibberish items.
In fact that too is just a screen; for what exactly, I haven't been
able to determine, nor has anyone else in most cases. Careful parsing
of the headers of all these junk mails -- copies of which by the way
should be sent (with headers) to the special UCE (Unsolicited
Commercial E-mail) data
Good, Mike. A fine example of "thinking outside the house".
-Bill
In a message dated 1/9/2004 4:18:28 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
> Tom,
>
> Instead of demolishing your neighbour's 2nd floor, consider adding a third
> floor to your own house. This could have additi
Dear Sundial-list members,
Richard Schmoyer's daughter, Laurel Browning, sent me a photo of a
(unfinished?) dial her dad was working on before he died. She has no
information about
it. It can be seen at www.precisionsundial.com/sundial_list.htm. Any
thoughts on what he was building?
http:
The prior note was sent with a misleading title by error-it was not a
solicitation to buy a dial. The Web Address was also misprinted and is
corrected
below.
Dear Sundial-list members,
Richard Schmoyer's daughter, Laurel Browning, sent me a photo of a
(unfinished?) dial her dad was working
The cone of the dial is facing upwards, because that is the way Mr.
Schmoyer's daughter took the picture. She is not a sundialist, and did not
know how to
position the dial. In use above a door, the dial would be turned over so
that the cone curved downward. This way the numbers will be upr
As far as I can tell, there is a noon gap in the dial commensurate with the
gnomon thickness.
-Bill
In a message dated 1/21/2004 4:42:56 AM Eastern Standard Time, [EMAIL
PROTECTED]
writes:
> She is a beauty isn't she?
> Very original way of positioning the style. That style has a certain wid
Hi Ken:
I started looking into what was needed with my Logitech Pro 4000 web
cam, and could not find the software to upload the images.
Do you know where to get it?
Have Fun,
Brooke Clarke, N6GCE
htp://www.PRC68.com
[EMAIL PROTECTED] wrote:
Hi Everyone,
Has anyone made the EarthDial y
"Anselmo Pérez Serrada" <[EMAIL PROTECTED]> wrote:
Sent: Sunday, January 11, 2004 7:40 PM
Subject: On coupled bifilars
> Dear dialists,
>
> As you'll probably know, if we couple on the same device
> a pair of sundials (of different kinds), not only they show solar
> time but also the meridian l
In a private email, Mac Oglesby has kindly pointed out an error in my
posting. I said "A standard horizontal bifilar dial has exactly the same
sheaf of hour lines as a common horizontal dial. Same for a vertical." This,
as Mac has pointed out, is incorrect.
What I meant to say was something like:
Pardon my ignorance David, but what's an "inferior" polar
dial, please?
Surely the latitude is irrelevant, as a polar dial is
merely inclined.
If I'[m right in thinking the dial is shaped like an
inverted letter "T", it seems to me that the shadow of the gnomon will fall on
the dial for
Ah, so that's what the enquiry was about!
The correct URL is http://www.mhs.ox.ac.uk/epact
In the picture in the catalogue, which is the only one
I've seen of this dial, this inferior polar dial isn't visible.
But I have to agree that 4,6,8 sounds
unlikely.
How much do we know about Kratzer'
http://pubs.giss.nasa.gov/abstracts/1997/Allison.html
Has anyone made the EarthDial yet? I did the dial in CorelDraw and saved it in PDF and took it to my local copy center but they were unable to print the completed dial, only an 8.5 x 11 page of part of the dial. I also tried to tiled the pages but could not get it on the disk. I have never
in 1982. I think
Edley McKnight's idea would be a good possibility even over two stories
and with some
angle changes.
Edley McKnight wrote:
Of course there are any number of ways that the information could be
sampled and sent in a discrete fashion. A set of tubes or slits at the
top with
This problem has inspired many solutions. However, I think some stray
from our
assumed understanding of what is a "sundial". As defined by someone
long ago,
"a sundial is a time measuring instrument with only one moving part, the
sun".
This needs to be extended by saying, "having no othe
While visiting S. France I passed through Fontvieille about 8 km NE of
Arles.
There is a Chateau de Montauban where Alphonse Daudet often stayed. He
wrote about the windmills near Fontvieille.
The Chateau was not open. Looking at one side I found a lovely vertical
dial
painted on the wall ne
I had not noticed before how wide the European time zone was, plus being
based
on 15E.
The summer time marking makes sense because a huge line of trees probably
shades the dial most of the time in the winter.
Too bad. I was hoping for something more interesting.
Claude
35N 120W - land of
You have done a "spectacular" job. I especially like
your comments. They are very informative and useful
to someone interested in making sundials.
Claude Hartman
35N 120W
Frans W. Maes wrote:
Dear sundial friends,
Some two years ago I published a website in Dutch about the unique Sundial
I agree with you Bill. The design seems to be for viewing from
the South. Thus a wall mount is easily done.
All that is missing is a bracket to attach to some surface.
The angle of the cone makes it appear that at low latitudes a
very elevated position might be difficult.
Since it is equato
I love it!
If Tom can sell his neighbor on the esthetic upgrade to his house, it's a
great solution.
How does the geometry work out? Would the mirror need to be *very* high,
say, over 2 stories itself? Closer, or farther than Tom's South wall? I
guess the design trick would be to calculate a Sou
I sketched out a vertical dial, figuring a mirror as the nodus on a pin
gnomon perpendicular to the dial face, using Fer J. de Vries' ZW2000
software. I used my northern California coordinates. It's a *little*
large, for a suburban home. A mirror 10 feet from the plane of the wall
seems to require
But one that couls lead to "escalating" the situation...
Dave
> Good, Mike. A fine example of "thinking outside the house".
> -Bill
>
> In a message dated 1/9/2004 4:18:28 AM Eastern Standard Time,
> [EMAIL PROTECTED] writes:
>
> > Tom,
> >
> > Instead of demolishing your neighbour's 2nd
On Thu, 15 Jan 2004, John Hall wrote:
> Hi Ed
>
> The answer is yes, and there is an example of how Longitude correction
> might be done in 'Practical Astronomy' by H. Robert Mills on page 106
> in the edition I have. To correct for EQT replace the straight hour
> lines with analemas and ensu
On Wed, 14 Jan 2004, Albert Franco wrote:
> I'm fairly new to this also; about a year's worth of studying what is
> online. So forgive errors.
> It seems that as Roger said it would make the base slanted at a
> cockeyed angle. And intuitively I'm not sure the hour lines would
> stay in the pro
On Fri, 16 Jan 2004, Mac Oglesby wrote:
> Many thanks for the URL to the S&T BASIC stuff. Chasing some of the
> links there brought back lots of memories. I began programming in
> BASIC in 1976, using a teletype connected to the Dartmouth
> Time-Sharing System, and still have several (working)
On Fri, 16 Jan 2004, Gianni Ferrari wrote:
> Hello boys !
> You are all too young!! :-)
>
> I have begun to program for my degree thesis, in 1965 in Bologna University
> in (Italy).
>
> At first in Assembler with a computer with a drum memory (how many
> remember their existence? ) , aft
On Sun, 18 Jan 2004, Douglas Hunt wrote:
> Can any of our Mailing-List experts suggest some horizontal sundial design
> suitable for locations almost on the Equator, (actually 2 Degrees North) ?
>
> We have been contacted by a school in Singapore, who would like to install
> a large playground s
On Sat, 24 Jan 2004 [EMAIL PROTECTED] wrote:
> Hi Everyone,
>
>Has anyone made the EarthDial yet? I did the dial in CorelDraw and saved
> it in PDF and took it to my local copy center but they were unable to print
> the completed dial, only an 8.5 x 11 page of part of the dial. I also tr
On Sun, 25 Jan 2004 [EMAIL PROTECTED] wrote:
> I think I know the answer to this one, and I'll say more in due course, but
> just to see what all you gurus say..
> What hour lines should be inscribed, and in what places, on an inferior polar
> dial for latitude 52N? The centrally-placed
On Fri, 30 Jan 2004, Roger Bailey wrote:
> The epact link didn't work for me. I was "not authorized to view this page".
> The main link did work. http://www.mhs.ox.ac.uk I then went to the
> collections database link and searched for 54054. There are six pictures of
> the Kratzer dial available.
David Brown, Somerset, UK
[EMAIL PROTECTED]
www.DavidBrown Sundials.com
What hour lines should be inscribed, and in what places, on an inferior polar dial for latitude 52N? The centrally-placed gnomon is 13 units high, the overall plate width (east-west) is 37 units and the north-south plate height is 26 units.
David Brown
Somerton, Somerset, UK
Thanks for your interest, Chris
David Brown
Somerton, Somerset, UK
What hour lines should be inscribed, and in what places, on an inferior polar dial for latitude 52N? The centrally-placed gnomon is 13 units high, the overall plate width (east-west) is 37 units and the north-south plate height is 26 units.
Thank you for the various replies sent in (4).
I clarifie
Can any of our Mailing-List experts suggest some horizontal sundial design
suitable for locations almost on the Equator, (actually 2 Degrees North) ?
We have been contacted by a school in Singapore, who would like to install
a large playground sundial - BUT ideally having nothing above ground-le
This led me to consider an offshoot of the skylight concept. Some of my neighbors have installed a "solar tube" which provides a skylight effect in a remote room by reflecting the sunlight down the shiny inner wall of a tube roughly one foot in diameter. The light emerges at the lower end of th
As a beginner to the fascinating study of gnomonics, let me say first of all
that it was especially rewarding to discover that a list such as this exists,
whereby novices such as myself may consult with professionals and folks of all
levels on matters of our mutual interests in dialing. So
Hi Tom,
Being an old Microwave engineer I don't believe that the information
could be recaptured after bouncing around the tube, but an
alternative optical method might work. A very wide angle lens at the
top, looking roughly south configured to have a very long focal length
on the back side
Hi Tom, shadow watchers,
A mirror objective might indeed work. Basically converting the large
angular movement of the sun into a much narrower angle at the top
and then re-expanding the angles at the bottom. This would be a
curved mirror of course, or a set of small mirrors. Approximating i
All:
A simpler idea might be to just use a video camera with a fisheye
lens. Maybe on top of a flagpole on top of the roof.
Edley.
Date sent: Thu, 08 Jan 2004 21:35:15 -0800
From: Tom Egan <[EMAIL PROTECTED]>
To: sundial@rrz.uni-koeln.de
Sub
Hi Ed,
As far as I know, any dial with a gnomon parallel to the earth's axis
may be corrected for EOT, Longitude and Daylight Savings Time by
rotating the entire dial around that axis. Since they are all based on
the projection of an equatorial dial.
Hope this helps!
Edley
> Hello All.
>
Hi Douglas and all,
I can think of a couple of approaches off hand.
A multiple ridge dial with each ridge only an inch or so high, the 11
and 1 o'clock shadows determining where the next ridge would go,
the 10 and 2 o'clock the next, etc. All the ridges pointing north and
south of course. 1
Mark and all,
Read it!, It Was good as have been the others by him.
Try it, You'll like it.
Edley.
To: sundial@rrz.uni-koeln.de
Subject:Gnomonics in a Murder-Mystery Novel
Date sent: Sun, 25 Jan 2004 14:06:23 -0800 (PST)
From:
Hi John,
Using the Mozilla-Firebird browser I can just "save as" a website and
it saves the main html file and makes a directory for all the pictures
and everything else. All I have to do is click on the main html and up
it comes in the browser. I've saved a number of these reference
copies
Ronitz,
Make a mirror in the window-sill and draw the hourlines on the
ceiling and walls.
Place the mirror inside and the refraction of the glass may be
disregarded.
The program ZW2000 calculates such mirrir dials.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkringmailto:[EMAIL PR
> I can send you 2 files with a complete list of topic sundials in Rome. The
> files are scannerized from the catalogue "Meridiane dei Comuni d'Italia".
> The file size is around 1 Mb. Please, let me know if you want.
Please could you send me these two files. I should be most
interested. Thank
> Are there any suggestions as to how to explain to children
> ...the way the analemmatic sundial functions?
Here is a simple explanation that I use when giving talks in
schools to children aged about 8.
I stand in the middle of the class holding a yellow balloon at
the end of a long stick. [T
Len Berggren, Ronit Maoz...
Several people have been kind enough to comment on my tips for
entertaining children so I will divulge one more...
I ask for eight volunteers to step forward and I give each one
a flag. The tallest child gets a flag saying `12 noon' and the
smallest gets one saying `
Dear sundial friends,
Some two years ago I published a website in Dutch about the unique Sundial
Park in Genk (Belgium), a permanent exhibition of classical and novel
sundials.
Finally, the English version is out. Have a look at:
www.fransmaes.nl/genk/welcome-e.htm
I hope you enjoy it! If you h
Hi Douglas & all,
It doesn't obey the initial conditions, but maybe a play-object is allowed
in a playground. How about a horizontal bar, on which children may turn
somersaults etc.? It can double as a sundial: let the bar just tilt 2 deg (3
cm at 1.70 m length), North end upward. Hour lines are
Hi Ronit,
Go to www.fransmaes.nl/sundials/ and choose "Analemmatic - extra info".
The first topic gives an intuitive explanation (I hope).
Regards, Frans
- Original Message -
From: "Ronit Maoz" <[EMAIL PROTECTED]>
To: "SUNDIAL MAILING LIST"
Sent: 23 January, 2004 3:23 PM
Subject: expla
Nicola Severino is working on a new Italian
gnomonic bulletin - similar to the International Gnomonic Bulletin but carrying
only Italian language items. The bulletin will be on the Internet and
available to all who register for it at:
http://it.groups.yahoo.com/group/webgnomonices
You ca
Peter,
We'd be glad to have you back as a member of NASS! There is indeed an
option to pay with pounds sterling - I'll send you all the details off list.
Fred Sawyer
- Original Message -
From: "Peter Tandy" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, January 06, 2004 11:45 AM
Subject: Rene
Claude,
In France, only one time zone is used - based on 15 degrees East of
Greenwich. This would result in a longitude correction of 41 minutes.
Adding another hour for summer time yields a total correction of 1hr. 41
minutes.
Fred
- Original Message -
From: "Claude Hartman" <[EMAIL P
The next issue of The Compendium will include
registration information on the NASS conference to be held in Tenafly NJ this
August.
To help assure a great turnout, I'd like to be
able to identify at least some of the talks that will be presented at the
conference; adding this information
Hello boys !
You are all too young!! :-)
I have begun to program for my degree thesis, in 1965 in Bologna University
in (Italy).
At first in Assembler with a computer with a drum memory (how many
remember their existence? ) , after in FORTRAN with an "ultramodern" IBM
1130 (with transisto
Hello Martin,
in addition to the information that Tonino Tasselli has already sent, you
can find in the Trastevere quarter (one of the most beautiful old Roman
quarter), exactly in Via del Moro 59, a shop that sells only sundials :
perhaps it is the unique shop of this kind in Italy.
It is con
Hi David,
if I
have not made great mistakes in my calculations - done quickly :-)
- you cannot inscribe any hour lines on your polar sundial facing
north.
At Lat.
52N on summer solstice, the Sun rises at 3h 47m (civil time) or at 3h 45m apparent Solar t
Wolfgang,
Thank you for your help. I ordered "Fazination Sonnenuhr" from Harri Deutsch using the Internet. It arrived yesterday.
Have a great 2004.
Hal
For more on mirror objectives, here is an article on using automobile
hubcaps and parabolic L'eggs containers as reflectors.
http://www.versacorp.com/vlink/jcart/allsky.htm
Fisheye photographic lenses are another option, but expensive. Some early
wide-angle camera lenses (for example, the Hi
As long as we're trying to top each other in computer seniority
My first computer program, in college for an IBM 650, was written in 1955.
Later, at Univac, I too programmed several drum-based computers (for
example, the water-cooled Univac 1103, which also had a core memory) and
other c
Dear all,
I am going to Granada, Cordoba and Seville in Andalusia, Spain
very shortly and wondered whether somebody might be able to point out
a few dials or astrolabes in the area.
Thanks: Heiner
51N/1W
-
Hi Tony,
Most of what you describe is done to fool spam filters, I think.
Many ISPs are implementing spam filters on their end to try to stem the tide
of junk mail, which overload their servers. Most of these filter programs
identify certain message elements that make them think an e-mail is spa
Happy New Year everybody!
Dave & I have expanded the Technical Information page of
the Stained Glass website to include glass and ceramic mosaic sundials. We
also have a section on them in the Photo Collection.
Mosaic sundials seem to be even more scares than stained and
etched glass win
Hello Ronit:
You asked a question that is dear to my
heart.
There are basically four types of glass
sundial windows that will create
a sundial inside a room, using the sun rays passing through (a)
window(s).
1. A stained or etched glass window that has a
gnomon on the window's exterio
Hi Ronit:
This type of interior sundial is easier to design than you might imagine.
If your hole-in-the-wall or ceiling aperture gnomon casts a beam of light
onto the floor, then the design of the sundial face would be the same as a
typical horizontal sundial with a perpendicular (vertical) gnomo
p.s. Ronit:
I forgot to answer your question about glass in the
aperature. Glass certainly is not required to be in the hole in the
wall and the dial will work slightly better without it (the spot will be
brighter). I just thought you wouldn't want your floor to get wet when it
rains!
J
Hi Tom:
Is a skylight hole in your roof possible?
This would eliminate most of your problems with mirrors. You don't need a
flat roof. A skylight hole could be used for any of the interior dials I
mentioned.
John L. Carmichael Jr.925 E. Foothills Dr.Tucson Arizona,
USATel: 520-696-1
Hi Tom:
The answers to your latest questions about the
solar tube are way beyond my level of knowledge! Hopefully someone smarter
than me can help you with answers.
good luck!
John L. Carmichael Jr.925 E. Foothills Dr.Tucson Arizona,
USATel: 520-696-1709Email: [EMAIL PROTECTED]Sundia
Title: Message
Thanks Bob for the link to those photos!
John L. Carmichael Jr.925 E. Foothills Dr.Tucson Arizona,
USATel: 520-696-1709Email: [EMAIL PROTECTED]Sundial
Sculptures Website: http://www.sundialsculptures.comStained
Glass Sundials Website: http://advanceassociates.com/Sundials/
I came across this website on etched glass. It is
considered to be the best website on the subject if any of you are interested in
making etched glass sundials. http://www.etchmaster.com/
John
PDF writers act like print programs so you must specify
"paper" size. On my FinePrint writer this is a custom setting. Also, set
print region to scale 1 to get exact size (don't scale drawing to fit
paper)
John L. Carmichael Jr.925 E. Foothills Dr.Tucson Arizona,
USATel: 520-696-1709Ema
Hello Mr. Fisher (and cc. British
dialists):Your letter made my day! I'm just thrilled that you
could provide us withthis new information on the lost John Oliver dial and
it's lost cousin.Hopefully, one of the British Sundial Society members will
be permitted toview and photograph the two l
Hello all:
Does anybody know if it is possible to burn a copy of a website onto a CD so
that when played back on any computer, the CD file will work and look just
like the website?
The reason I ask is because I would like to make CD's of the SGS website to
pass out in Oxford and for the digital
The Wolsey/Kratzer dial is discussed in Peter Drinkwater's booklet "The Sundials of Nicholas Kratzer". Although he doesn't analyse the hourlines, it is clear that Drinkwater is no admirer of Kratzer's dialling abilities - he accuses him of all sorts of muddles and mistakes.
The "6" marking on
Hi Ed
The answer is yes, and there is an example of how Longitude correction
might be done in 'Practical Astronomy' by H. Robert Mills on page 106
in the edition I have. To correct for EQT replace the straight hour
lines with analemas and ensure that there is a defined point on the
shadow castin
Anne,
Your information on tides in high N latitudes pretty much mirrors tides in
Antarctica: very small range. I can't give you exact figures, but if you go
to the Australian Antarctic Data Centre on the site of the Australian
Antarctic Division (http://www.aad.gov.au/default.asp?casid=5212), you
Fellow Shadow Watchers,
Regarding the blank emails.
I have been told by people knowledgeable in these matters that random names
are computer generated and are attached to recognised Internet Service
Providers totally automatically. Many millions of these are broadcast every
second and the law of
Dear Dialists,
due to the actual Mars activities the Goddard Institutes for Space Studies
offer a sun clock Freeware program showing day and night on the planet:
http://www.giss.nasa.gov/tools/mars24/
and a background paper on planetocentric solar coordinates for download at:
Sorry, I forgot to mention the Mars analemma:
http://www.giss.nasa.gov/research/intro/allison_02/
Josef Pastor
E-Mail: [EMAIL PROTECTED]
-
Len Berggren
Lat. 49.3° N.
Long. 122.9° W.
> Are there any suggestions as to how to explain to children
...the way the analemmatic sundial functions?
Here is a simple explanation that I use when giving talks in
schools to children aged about 8.
I stand in the middle of the class holding
Dear Fred,
It might encourage people to attend (and start thinking about possible
talks) if we had some idea of what the gnomonic attractions of Tenafly
were.
Best,
Len
On Saturday, January 24, 2004, at 07:08 AM, Fred Sawyer wrote:
TahomaThe next issue of
The Compendium will include regis
Sorry for bothering the whole list with what was meant to be a reply
to Fred!
Len
On Saturday, January 24, 2004, at 09:55 AM, Len Berggren wrote:
Dear Fred,
It might encourage people to attend (and start thinking about possible
talks) if we had some idea of what the gnomonic attractions of
Does anyone have a small (16-bit-by-16-bit or 32-by-32) icon of the Sun
(format GIF or JPEG)? If so, can I have it? I've written a program that
shows, for various map projections, the areas of the Earth illuminated by
sunshine and in the dark, and I'd like to be able to add the ability to show
the
Somewhat off topic, but how do you translate (a) the right ascension of a
star and (b) the current date and time into (c) the apparent longitude of
the star?
-
Dear Anselmo:
thanks for the approximation. How close is it? And is UT the time at
Greenwich?
Regards, Brad
-Original Message-
From: Anselmo Pérez Serrada [mailto:[EMAIL PROTECTED]
Sent: Friday, January 16, 2004 5:19 PM
To: sundial@rrz.uni-koeln.de
Subject: Re: Right Ascension
Dear Brad
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