In a previous article, the 7,500 foot-long Erdevan alignmentsA name special to Carnac's three successive groups of parallel rows of stones, starting above Carnac called Le Menec, Kermario, and Kerlescan and another found near Erdevan. were seen to have been a long count of the SarosThe dominant eclipse period of 223 lunar months after which a near identical lunar or solar eclipse will occur. period of 19 eclipse years versus the distance to Mane Groh dolmenA chamber made of vertical megaliths upon which a roof or ceiling slab was balanced. of 19 solar years, this probably conceptualized as an 18-19-6 near-Pythagorean triangle, whose inner angle is the bearing from east of Mané Groh. However, the path directly east caused the actual alignments, counting the Saros, to veer south to miss the hill of Mané Bras.
It has been remarked that the form of the northern alignments of Edeven were similar to those starting at Le Menec’s egg-shaped stone circle 4.25 miles away, at a bearing 45 degrees southeast. Whilst huge gaps have been caused in those of Edeven by agriculture, the iconic Le Menec alignments seem to have fared better than the alignments of Kermario, Kerlescan and Petit Menec which follow it east, these being known as the CarnacAn extensive megalithic complex in southern Brittany, western France, predating the British megalithic. Alignments above the town of that name.
One similarity between alignments is the idea of starting and terminating them with ancillary structures such as cromlechs (stone kerb monuments), such as the Le Menec egg and, despite road incursion, a3-4-5 structure similar to Crucuno, aligned to the midsummer sunset by a length 235 feet long. This is the number of lunar months in the 19 year MetonicGreek: The continuous 19 year recurrence of the moon's phase and location amongst the stars. period and is factored 5 times 47. Another similarity may be seen in Cambray’s 1805 drawing of these Kerzerho alignments, at the head of ten stone rows marching east (figure 1).
In these northern alignments, the bearing of the 18-19-6 triangle has the same angle to the south-east as the Carnac alignments have to north-east because both recorded the same relationship between the solar and eclipse years, whilst having a different focus on eclipses and the moon’s nodal periodUsually referring to the backwards motion of the lunar orbit's nodes over 6800 days (18.618 years), leading to eclipse cycles like the Saros., respectively.
As previously stated, the northern project was studying the Metonic period as consisting of five of the 47-month long Octon eclipse period of four eclipse years, and in 5 of these 235 lunar months equal the 19 solar years of the Metonic.
In contrast, the Carnac alignments over 4 miles south-east were initially studying the movement of the deviation of the moon from the eclipticThe path of the Sun through the sky along which eclipses of sun and moon can occur, traditionally divided into the 365¼ parts of the solar year, each part then a DAY in angle rather than time., by continuously observing the horizon events of the moon.Normally, only the maximum and minimum standstill of the moon can be deduced as alignments of interest for megalithic astronomers and, at Carnac, these alignments were easy, being very closely the alignment of the diagonals of single and double squareA unit rectangle of 1 by 2, with important use for alignment (Carnac), cosmology (Egypt) and tuning theory (Honnecourt Man). respectively. But it is the triple square whose diagonal’s length, relative to its base, gives the length of the solar yearFrom Earth: the time in which the sun moves once around the Zodiac, now known to be caused by the orbital period of the Earth around the Sun. relative to the eclipse yearthe time taken (346.62 days) for the sun to again sit on the same lunar node, which is when an eclipse can happen.. This interplay between lunar alignments and Carnac’s natural counting geometry can be seen in figure 2.
All of the indications are that the northern alignments preceded the southern (Carnac) alignments in that; having established the best eclipse period of all (the Saros), the next objective would be to study the 18.618 years over which the range of moon-rises and moon-sets (to east and west) have available angular range over an 18.618 year cycle, the minimum being the least angle (26.565 degrees) from east or west and the maximum over the greatest angle (~45 degrees) from east or west (- a right angle).
Another interesting comparison between Kerzerho and Le Menec is to place Thom’s survey of the Le Menec over the Google Earth image so as to make a direct visual comparison of unsuspected similarities.
The staggering of Erdeven’s northern-most rows is very similar to those at Le Menec, noting that only Le Menec’s first rows follows Thom’s abstract line to the cromlecs informing Pythagorean triangle’s (3-4-5The side lengths of the “first” Pythagorean triangle, special because the side lengths are successive small primes and, at Carnac, defined the solsticial extremes of the sun.) hypotenuse. Thom found for the angle of a 1-2-root 5 hypotenuse relative to north as appears the case at Erdeven also. The white line, marked by its 18.4 degree angle from east, to Er Groh would point directly east if Figure 3 was tilted instead for Le Menec, showing that these two alignments are like symmetrical twins. The 36.8 degree line to midsummer sunset would then become the egg’s shorter axis pointing to the midsummer sunrise.
This sort of comparison draws attention to the eastern hypotenuse of where the egg would be, it the back garden of the house. One stone apparently exists on that hypotentuse (and starting line of alignment) in the position that would terminate row 10 of Le Menec, but at Kerzerho also would terminate arrow, as per figure 4.
This demonstrates that more than passing comparison of the northern and southern alignments may reveal mysterious similarities pointing to new ideas as to the purposes of the two monuments.