Our survey at Le Manio revealed a coherent arc of radial stones, at least five of which were equally long, equally separated and set to a radius of curvature that suggested a common centre. It appears the astronomers at Le Manio understood that, following three lunar sidereal orbits (after 82 days) the moon would appear again *at the same point on the ecliptic at the same time of day*

# Tag: lunar orbit

## 82: A Natural Accurate Pi related to Megalithic Yard

In my academia.edu paper on lunar simulators, based upon the surviving part of a circular structure at Le Manio (Carnac, Brittany), a very simple but poor approximation to PI could be assumed, of 82/26 (3.154) since there seem to have been 82 stones in the circle and the diameter was 26 of the inter-stone distance of 17 inches. The number 82 is significant to simulation of the moon’s orbit since that orbit is very nearly 27 and one third days long (actually 27.32166 days). In three orbits therefore, there are almost exactly 82 days and in day-inch counting that is 82 day-inches. Also of interest is the fact that in three orbits, the exact figure would be 81.965 day-inches which approaches the megalithic rod of 2.5 MY as 6.8 feet.

Continue reading “82: A Natural Accurate Pi related to Megalithic Yard”## Three Lunar Orbits as 82 day-inches

*Sacred Number and the Lords of Time* interpreted Thom’s megalithic fathom of 6.8 feet (as 2.72 feet times 2.5) found at Carnac’s Alignments as a useful number of 82 day-inches between stones in the stone rows of Le Menec. After 82 days, the moon is in almost exactly the same place, amongst the stars, because its orbit of 27.32166 days is nearly 27 and one third days. Three orbits sums to nearly 82 days. But the phase of the moon at that repeated place in the sky will be different.

## Story of Three Similar Triangles

*first published on 24 May 2012*

Interpreting *Lochmariaquer *in 2012, an early discovery was of a near-Pythagorean triangle with sides 18, 19 and 6. This year I found that triangle as between the start of the Erdevan Alignments near Carnac. But how did this work on cosmic N:N+1 triangles get started?

Robin Heath’s earliest work, *A Key to Stonehenge* (1993) placed his **Lunation Triangle** within a sequence of three right-angled triangles which could easily be constructed using one megalithic yard per lunar month. These would then have been useful in generating some key lengths proportional to the lunar year:

**the number of lunar months in the solar year,****the number of lunar orbits in the solar year**and**the length of the eclipse year in 30-day months.**

all in lunar months. These triangles are to be constructed using the number series 11, 12, 13, 14 so as to form N:N+1 triangles (see figure 1).

Continue reading “Story of Three Similar Triangles”n.b. In the 1990s the primary geometry used to explore megalithic astronomy was N:N+1 triangles, where N could be non-integer, since the lunation triangle was just such whilst easily set out using the 12:13:5 Pythagorean triangle and forming the intermediate hypotenuse to the 3 point of the 5 side. In the 11:12 and 13:14 triangles, the short side is not equal to 5.

## Astronomical Rock Art at Stoupe Brow, Fylingdales

first published 28 October 2016

I recently
came across *Rock Art and Ritual *by
Brian Smith and Alan Walker, (subtitled *Interpreting
the Prehistoric landscapes of the North York Moors. *Stroud: History Press
2008. 38.). It tells the story: Following a wildfire of many square miles of
the North Yorkshire Moors, thought ecologically devastating, those interested
in its few decorated stones headed out to see how these antiquities had fared.

### Background

Fire had revealed many more stones carrying rock art or in organised groups. An urgent archaeological effort would be required before the inevitable regrowth of vegetation.

A photo of one stone in particular attracted my attention, at a site called Stoupe Brow (a.k.a. Brow Moor) near Fylingdales, North Yorkshire.

Continue reading “Astronomical Rock Art at Stoupe Brow, Fylingdales”