Hi fellows!
Could you please solve this little doubt of mine: I’m intending to
make a cylindrical “bottle” sundial, which would show the acronychal
rising of some stars. But, how can I calculate the nearest day when
the perfect opposition between the sun and a given star occurs? I
mean, what’s the
Hello fellow dialists, how are you?
I'm with a problem here which doesn't concern exactly to sundials, but
since it deals with sun's position and his shadows, I couldn't think
of anyone better than you to help me.
I have a little garden here at home, a walled area where I grow some
plants in pots.
Interesting indeed, but, if the exact time of solstice happens to be at
night, it would not show the word? For the text suggests that it's that
precise.
2012/6/26 Robert Terwilliger b...@twigsdigs.com
Astronomy Picture of the Day
** **
http://apod.nasa.gov/apod/ap120626.html
**
I think it's a little, a very little less than 365,25 rotations. This very
little, accumulated through the centuries, has introduced an error in the
seasons, which caused the Pope Gregory to correct the calendary in the 16th
century. For all I know, the very little above is something like 3 days
I used to think that the longest day was the summer solstice. Methinks that
you refer to some effect from the Equation of Time. And I don't know if
there is a name for it.
2011/9/14 Frank Evans frankev...@zooplankton.co.uk
Greetings, fellow dialists,
I tried to astonish my grandson by telling
Hello Brent,
as long as I know, the Earth's speed really has a variation throughout the
year, for its orbit being ellliptical, with the Sun in one of the ellipse
focuses, it is faster when nearer to the sun (perihelion) and slower when
its at maximum distance from it (aphelion).
Both the
, but in december and june (it's only an example, I
don't know how much time does it need to change), then the EoT was
different.
2011/3/25 Marcelo mmanil...@gmail.com
Hello Brent,
as long as I know, the Earth's speed really has a variation throughout the
year, for its orbit being ellliptical
://www.orbitsimulator.com/gravity/articles/ssbarycenter.html
which well shows the effects of the different planetary influences on the
sun’s barycentre.
Patrick
*From:* Kevin Karney ke...@karney.com
*Sent:* Friday, March 25, 2011 8:16 PM
*To:* Marcelo mmanil...@gmail.com
*Cc:* Sundial List sund...@rrz.uni
Further, I want to know if those clocks, of Prague and Bern, can show when
an eclipse occurs.
-- Forwarded message --
From: Marcelo mmanil...@gmail.com
Date: 2011/3/22
Subject: Re: Prague Clock
To: Willy Leenders willy.leend...@pandora.be
How is that lunar dial? Does it show
I kinda approve the choice for constellations, as you can use the sundial
also as a moondial (with a corrective table for the age of moon, and in
order to know the hours by night only approximately) and, by marking the
shadow cast by the moon on the dial, you could esteem in what constellation
the
in Flanders (Belgium)
Visit my website about the sundials in the province of Limburg (Flanders)
with a section 'worth knowing about sundials' (mostly in Dutch):
http://www.wijzerweb.be
Op 20-mrt-2011, om 18:44 heeft Willy Leenders het volgende geschreven:
You are right, Marcelo.
Even
Methinks that sundial depicts the constellations, and not the signs, as the
lines of solstices are markd by Scorpio/Sagitarius and Taurus/Gemini. It's
not common to see sundials constellation-oriented, with precession of
equinoxes taken in account.
2011/3/20 R Wall
My father lives in Japan, but thanks God, he didnt suffer with the tsunami,
although we are yet apprehensive, as well as all the Japanese descendents
here in Brazil.
Thanks for your words, Conxita.
2011/3/15 da...@davidbrownsundials.com
I'll second that! Well put, Conxita.
David Brown
-koeln.de]
*On Behalf Of *Marcelo
*Sent:* Thursday, March 10, 2011 6:13 PM
*To:* Sundial List
*Subject:* Where are the women?
I've just noticed that, as long as I remember, there is no female
participation in this mailing list. As I study in the Astronomical and
Geophysical Institute
I've just noticed that, as long as I remember, there is no female
participation in this mailing list. As I study in the Astronomical and
Geophysical Institute at the University of Sao Paulo, where we lack not of
the gracious presence of women - there are more men here, but women are
expressive too
The first image was taken from here:
http://www.angelfire.com/my/zelime/sundials.html
If you do want a simple ring dial (farmer's dial), search for the software
Sonne, listed here:
http://www.mysundial.ca/tsp/cad.html
2011/2/16 Donald Christensen dchristensen...@gmail.com
Does anyone know
Yeah, I would like to see Polaris and the Ursa Major.
I'm from Brazil and our flag also displays the Southern Cross, along with
other stars from Scorpion, Virgo, Canis Major, Orion etc. each star
representing one Brazilian state.
The globe depicts the sky at November 15th of 1889, when Brazil
Dear Frank,
you know, the flag bears an artistical and simbolical drawing of the sky,
not a scientifically precise representation of it. Now, to your questions:
1. Sorry, I don't know.
2. That's because, as you found, the republic was officialy proclaimed
(signed) at 8:30 am on 15 november 1889
Thank you very much, I'll try it soon!
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
with the hole, it's constituted of but one ring):
http://tiny.cc/h9tty
Here is a link to a sketch I made that I hope will make clear my problem:
tiny.cc/9dtgi
Please be indulgent with my poor English.
Thanks for your time!
Marcelo Manilio
---
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