Two comments really: one is from your last post "becomes less recognisable over centuries " is a mystery to me. Why? and does recognisability return cyclically?
The other is why assign the name "Sun marker" for one of the rotating attachments to the aubrey positions? Would the "keepers" have known it was a Sun marker that they were using or just, say, a Blood marker (blood for blood-moons) because, if so, then they must have tumbled to the idea of a sweeping earth shadow and some appreciation of orbits.
----- Original Message -----
From: thomas dave
To: [log in to unmask]
Sent: Saturday, December 20, 2014 5:38 PM
Subject: Re: [BRITARCH] Stonehenge Aubrey Hole Eclipse mechanism
what i find interesting is the visible repetition of Moon pattern in the
skies (metonic cycle) after 19 years.
This pattern becomes less recognisable over centuries as the metonic
On 20 December 2014 at 02:11, Lynne Kelly <[log in to unmask]> wrote:
> Wow. Today's Britarch is presenting lots of rigorously presented food for
> I've downloaded and glanced at this, Dave, and am looking forward to
> absorbing new ideas.
> Thank you.
> On 20/12/2014, at 10:52 AM, thomas dave <[log in to unmask]> wrote:
> > Winter solstice at Callanish for 19 years (2011-30) animated and sonified
> > here
> > cheery Dave
> > On 19 December 2014 at 23:26, Lynne Kelly <[log in to unmask]>
> >> Dear Simon,
> >> Thank you for that link and animation. Far from off topic, I find it
> >> fascinating. I also find refreshing the way you wish to understand
> >> ideas that have been rigorously presented, while being willing to reject
> >> their certainty in the original Neolithic purpose.
> >> I have no doubt about the obvious solar alignments, but am unsure about
> >> what further can be claimed with any degree of certainty, so for my
> >> writing assume no more than that. But further astronomical understanding
> >> would not be surprising and I am keen to follow that debate. I struggled
> >> with Hoyle's descriptions and did not work at them as I didn't need more
> >> than solar alignments for the argument I present in my forthcoming book
> >> about the purpose of Neolithic and American Archaic monuments.
> >> Your animation has clarified my understanding well. I look forward to
> >> further discussion on the extent to which we have clear evidence of
> >> Welcome and thank you.
> >> Lynne
> >> On 20/12/2014, at 5:41 AM, Simon B <[log in to unmask]> wrote:
> >>> Dear list,
> >>> Hawkins and, later, Hoyle both suggested mechanisms by which the 56
> >> Aubrey Hole circle at Stonehenge could be employed as an eclipse
> >> device.
> >>> In attempting to explain the simpler of the two methods (Hoyle's) in
> >> past, I've found it awkward to explain to non-astronomers how it could
> >> operated. It has been my ambition for a number of years to create a
> >> representation that demonstrates the principle.
> >>> The forthcoming pair of eclipses in March/April 2015 (solar then lunar)
> >> offered me an opportunity to create a short animation of the basic
> moves of
> >> the various marker stones suggested by Hoyle.
> >>> For your consideration, here is the result of my labours:
> >>> http://community.novacaster.com/showarticle.pl?ft=;id=11453;n=4001;p=1
> >>> The intermeshing of three gears, representing the solar, lunar and
> >> cycles can indeed be approximated using the Aubrey Holes although the
> >> debate as to whether neolithic people intended this usage will continue
> >> be a lively one.
> >>> If you view the animation, please do pay attention to the text written
> >> below it which points out some of the more obvious criticisms that can
> >> levelled at the method.
> >>> This is my first post to the list, so I hope it won't be judged as
> >> off-topic.
> >>> Regards
> >>> Simon