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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Frank, <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Andl notice another thing. The sentence is, on its face, nonsense. The tilting of the orbit has nothing to do with its elliptical shape. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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 <a href="https://www.space.com/3304-earth-closest-sun-dead-winter.html#:~:text=The%20noontime%20position%20of%20the%20Sun%20in%20the,line%20running%20through%20the%20analemma%20is%20the%20meridian.">analemma</a>. 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. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Have you noticed that the rising full moon is moving rapidly up the horizon. By march it will be rising in the NE. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Nicholas Thompson<o:p></o:p></p><p class=MsoNormal>Emeritus Professor of Ethology and Psychology<o:p></o:p></p><p class=MsoNormal>Clark University<o:p></o:p></p><p class=MsoNormal><a href="mailto:ThompNickSon2@gmail.com"><span style='color:#0563C1'>ThompNickSon2@gmail.com</span></a><o:p></o:p></p><p class=MsoNormal><a href="https://wordpress.clarku.edu/nthompson/"><span style='color:#0563C1'>https://wordpress.clarku.edu/nthompson/</span></a><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Friam <friam-bounces@redfish.com> <b>On Behalf Of </b>Frank Wimberly<br><b>Sent:</b> Tuesday, December 29, 2020 8:48 PM<br><b>To:</b> The Friday Morning Applied Complexity Coffee Group <friam@redfish.com><br><b>Subject:</b> [FRIAM] Sunset and Sunrise<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:#202124'>This topic came up at a recent meeting. The word "main" makes me wonder what the other reasons are.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:#202124'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:#202124'>The main reasons for the <b>earliest</b> sunset to occur in early December and the <b>latest sunrise</b> to occur in January are the fact that Earth's axis is tilted (23.5°) and Earth's orbit around the sun is <b>not</b> a perfect circle shape.</span> <br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><div><p class=MsoNormal>Frank Wimberly<br>140 Calle Ojo Feliz<br>Santa Fe, NM 87505<br>505 670-9918<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Research: <a href="https://www.researchgate.net/profile/Frank_Wimberly2" target="_blank">https://www.researchgate.net/profile/Frank_Wimberly2</a><o:p></o:p></p></div></div></div></div></div></body></html>