Hi David and all, There are "lunastices" generally called lunar standstills. These occur every month as opposed to every year for solstices. As the moons orbit is tilted about 5° from the ecliptic, these lunastices are different from the solstices and vary over an 18 year period from major to minor and back to major standstill due to precession. Stonehenge and other ancient megaliths are reported to be demonstrations of lunastices. The motions of the moon are very interesting as such a short cycle, a month, and only 18 years in their precession cycle. This opens up the topic of moon dials, specifically declination dependant moon dials. Stay tuned as this lunacy unfolds at the NASS conference this year.
Regards, Roger Bailey From: David Bell Sent: Friday, May 30, 2014 12:12 PM To: Robert Terwilliger Cc: <[email protected]> Subject: Re: Lunar Analemma Great analemma (Lanalemma?) photo! So, how does it continue, month by month? In a spiral fashion, then return over the same area of the sky, after slowing to a halt? Are there "lunastices", then? If so, how do they correspond to the solstices! Dave Sent from my iPhone On May 30, 2014, at 2:34 AM, "Robert Terwilliger" <[email protected]> wrote: Earth Science Picture of the Day http://epod.usra.edu/blog/2014/05/lunar-analemma.html As part of my morning routine I take a look at a page I made with two “Pictures of the Day” Astronomy and Earth Science. I made up another one so anyone interested can take a look at them. Bookmark it. http://www.twigsdigs.com/annex/picture/picture_od.html It uses Iframes so scrolling takes some getting used to. Bob --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4592 / Virus Database: 3950/7577 - Release Date: 05/28/14 ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4592 / Virus Database: 3955/7594 - Release Date: 05/30/14
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