- .... . -..-. . -. -.. -..-. .. ... -..-. .... . .-. .Yes. I see. Nifty. But it repeats the assertion that the tilting of the earth also has to do with it. Could it be that the fact that the earth is not quite a sphere be playing a role, in which case the tilting on the axis would make a difference? Where are all our knowitall nerds when we need them. (};-)]
N
Nicholas Thompson
Emeritus Professor of Ethology and Psychology
Clark University
https://wordpress.clarku.edu/nthompson/
From: Friam <[hidden email]> On Behalf Of Frank Wimberly
Sent: Tuesday, December 29, 2020 9:27 PM
To: The Friday Morning Applied Complexity Coffee Group <[hidden email]>
Subject: Re: [FRIAM] Sunset and Sunrise
Try this one, Nick. It sounds like what you're saying:
http://wxguys.ssec.wisc.edu/2019/12/16/solarday/
---
Frank C. Wimberly
140 Calle Ojo Feliz,
Santa Fe, NM 87505
505 670-9918
Santa Fe, NM
On Tue, Dec 29, 2020, 8:18 PM <[hidden email]> wrote:
Frank,
Andl notice another thing. The sentence is, on its face, nonsense. The tilting of the orbit has nothing to do with its elliptical shape.
I have tried to figure out the answer to this question for years and the only explanation that I have come up with is that during the period from early December to early January, the days stay roughly the same length but noon moves. It has to do with the analemma. Notice that the day-to-day path of the highest sun is moving parallel to the horizon and perpendicular to the meridian during that period. If you think of that moment as “noon”, noon is moving. But why the analemma? Your guess is as good as mine.
Have you noticed that the rising full moon is moving rapidly up the horizon. By march it will be rising in the NE.
Nicholas Thompson
Emeritus Professor of Ethology and Psychology
Clark University
https://wordpress.clarku.edu/nthompson/
From: Friam <[hidden email]> On Behalf Of Frank Wimberly
Sent: Tuesday, December 29, 2020 8:48 PM
To: The Friday Morning Applied Complexity Coffee Group <[hidden email]>
Subject: [FRIAM] Sunset and Sunrise
This topic came up at a recent meeting. The word "main" makes me wonder what the other reasons are.
The main reasons for the earliest sunset to occur in early December and the latest sunrise to occur in January are the fact that Earth's axis is tilted (23.5°) and Earth's orbit around the sun is not a perfect circle shape.
--
Frank Wimberly
140 Calle Ojo Feliz
Santa Fe, NM 87505
505 670-9918
- .... . -..-. . -. -.. -..-. .. ... -..-. .... . .-. .
FRIAM Applied Complexity Group listserv
Zoom Fridays 9:30a-12p Mtn GMT-6 bit.ly/virtualfriam
un/subscribe http://redfish.com/mailman/listinfo/friam_redfish.com
archives: http://friam.471366.n2.nabble.com/
FRIAM-COMIC http://friam-comic.blogspot.com/
FRIAM Applied Complexity Group listserv
Zoom Fridays 9:30a-12p Mtn GMT-6 bit.ly/virtualfriam
un/subscribe http://redfish.com/mailman/listinfo/friam_redfish.com
archives: http://friam.471366.n2.nabble.com/
FRIAM-COMIC http://friam-comic.blogspot.com/
| Free forum by Nabble | Edit this page |