Jan,
A better photo of the clock in Bern is at
http://www.photographersdirect.com/buyers/stockphoto.asp?imageid=1511348
This clock has at first sight a similar design as the clock in Prague.
However, it has not a outer ring that moves to and fro to indicate Italian or
Bohemian hours.
An indicat
More than the clock in Prague the clock in Bern has a calendar dial built in
and an indication of the day of the week.
The calendar in Prague is located separately under the clock.
See
http://upload.wikimedia.org/wikipedia/commons/5/5e/Zytglogge_astronomical_clock_with_labels.png
Willy Leenders
Further, I want to know if those clocks, of Prague and Bern, can show when
an eclipse occurs.
-- Forwarded message --
From: Marcelo
Date: 2011/3/22
Subject: Re: Prague Clock
To: Willy Leenders
How is that lunar dial? Does it show the moon's phases and in what sign it
is?
And I'
Marcelo,
1.
The littele moon in the clock shows the moon's phases and in what sign the moon
is.
See an animation at:
http://www.praguealacarte.com/orloj/orlojLoader.html
2.
The winter signs are narrower in length, not in angle.
And the angular velocity of the hand through the sign is constant.
T
The nodes of an orbit are the points where the orbiting body pass through the ecliptic in either direcrion. The point where the object's latitude changes from minus to plus is the ascending node and the descending node is where the body goes from postive to negative latitude.
Some old clocks
Fascinating stuff, thanks for the info!
--
Jan
On Tue, Mar 22, 2011 at 09:09, Willy Leenders wrote:
> Marcelo,
> 1.
> The littele moon in the clock shows the moon's phases and in what sign the
> moon is.
> See an animation at:
> http://www.praguealacarte.com/orloj/orlojLoader.html
> 2.
> The win
For eclipses to happen, the 'line of nodes' must be
aligned with the sun. This happens roughly every six months
and create the 'eclipse seasons' during which eclipses
are possible.
> href="/netmail/static/deg/css/wysiwyg-3933289048.css" media=all>
>
>
> The nodes of an orbit are the points
