; From: Woody Sullivan
> Subject: RE: sunset/sunrise times
> To: sund...@rrz.uni-koeln.de
> Received: Sunday, October 18, 2009, 3:45 AM
>
> RE: sunset/sunrise times
> Tom & Thibaud et al.:
>
>
> An
> interesting consequence of the time of sunrise/set varying
-Original Message-
From: Woody Sullivan
To: sund...@rrz.uni-koeln.de
Sent: Sun, Oct 18, 2009 11:45 am
Subject: RE: sunset/sunrise times
Tom & Thibaud et al.:
An
interesting consequence of the time of sunrise/set varying with height
of the eye is that in principle one could do
Greetings, fellow dialists,
Long ago I posted a note about a meteorologist aboard a British weather
ship who observed three green flashes at one sun setting from three
decks of the ship. I worked out that this was just about possible.
Frank 55N 1W
---
Hi Woody,
I read a few years ago of some astronomers in the Alps who had seen multiple
instances of a single 'green flash' by doing exactly what you describe.
best wishes,
Peter
Quoting Woody Sullivan :
> Tom & Thibaud et al.:
>
> An interesting consequence of the time of sunrise/set
Tom & Thibaud et al.:
An interesting consequence of the time of sunrise/set varying
with height of the eye is that in principle one could do the
following: Observe sunset over the ocean from a beach; quickly climb
stairs of a tower or run up a cliff or sand dune (for Holland!), and
then see
The Explanatory Supplement to the Astronomical Almanac has several separate
and extensive discussions on this topic, in particular section 9.33 in the
1992 edition, page 487. A small portion of the section is:
"At sunrise and sunset the apparent altitude of the upper limb on the
horizon is zero
