Calanais I (Callanish) and the Equinoctial Moon

by Stephen Whitehead

The following article will attempt to establish a relationship between the East row of stones at Calanais I (Callanish), the equinoctial (Autumnal) full moon and the ritualistic or ceremonial importance of such the event. The study is based on astronomical study, field work and knowledge of the ancient civilisations of Europe and beyond. If you'd like to pass comment or have knowledge of similar events elsewhere please do so at the bottom of this page.

Calanais (Callanish) is located on the Isle of Lewis in the Outer Hebrides of Scotland, and home to a fascinating collection of stone circles and standing stones. The remoteness of these islands has helped enormously in the preservation of this ancient and complex ritualistic landscape. Calanais is sometimes referred to as the Stonehenge of Scotland, while the builders of this monument never had the resources of their Southern counterparts the knowledge and understanding of the skies is equally impressive. It is the location and setting within the landscape which stands this monument apart from all others. No where else can we see such a complex and fascinating collection of lines and lunar phenomena documented in stone by a succession of Bronze Age people.

• Calanais (Callanish) a brief history
• What purpose does the East row serve and why was it built?
• Summer’s End, a time of festival
• The Sun and Moon and the Theatre of Light
• Autumnal moonrise table 2002 - 2020
• Autumnal moonrise table 1800BC - 1782BC
• Comments and Debate
  

A brief history of Calanais I

Archaeological study suggests the erection of the first stones at Calanais I (Callanish) began around 3000BC. The construction started with the tallest of the stones, the central monolith, subsequently followed with the erection of 13 stones forming a flattened circle encapsulating the central monolith. At a later period the North avenue and the South and West rows appeared. The East row was added to the complex around 1800BC some 1200 years after initial work began. The central burial cairn was the last feature added to the site appearing at some stage between 1800BC and 1000BC after which, the site was abandoned and became engulfed in peat. The East row at Calanais I (Callanish) consists of five erect stones, many early plans of the site only recorded four, the fifth stone was re-discovered by Margaret and Gerald Ponting in 1977 and was successfully re-erected in its true position by the Monuments Department of the Scottish Development Department in 1982.

The Calanais East row and a background of previous studies?

Admiral H Boyle Somerville suggested the East row indicated a line to the rising of Pleiades, a group of bright stars which for many cultures had associations with funery rites. At around 1800BC the constellation could be seen rising in the East during the Autumn months. Somerville was an early convert to the field of archeo-astronomy and undertook the the first modern survey of Calanais. He reported his findings in a paper read to the Royal Anthropological Institute and had the same paper published in the British Astronomical Association journal November 1912. My own findings suggest the constellation would have risen some 10 degrees North of the East row position, it would take another hour before the stars rose and crossed the position indicated by the East row. Lines to stars have been largely discounted in the field of Acheo-astronomy in recent times but perhaps this theory deserves closer scrutiny. Much of Sommervilles work centered around lines to stars but he gave us the first evidence that the builders of Calanais where studying the lunar cycles, he found that an alignment accuratley indicated the Northern extreme position of the rising full moon around the time of the Winter solstice during the 18.6 year lunar cycle. He also connected the writings of the Greek writer Diodorus of Siculus to Calanais. There is no evidence Diodorus ever visited Britain it seems he was reporting the tales of an earlier traveler.

In 55 BC Dioddorus wrote: It is said that in this island of the Hyperboreans there is a spherical temple and the moon appears very near to the earth; that certain eminences of a terrestial form are plainly seen upon it; that the god (Apollo) visits the island once in the course of 19 years. During which time the god plays upon the harp,and dances every night from the vernal Equinox to the rising of the Pleiades, pleased with his own successes.

We only know the Hyperboreans lived somewhere far North of Greece, but it's only at the latitude of the Isle of Lewis do we see the moon behave in such a dramatic fashion of which the Greek historian wrote. The work of Gerald Ponting and Margaret and Ronald Curtis, has done much to illustrate this lunar phenomema and the relationship to the range of hills know as the sleeping beauty or the old woman of the moors. When the moon reaches it's southern extreme for one year in every 19 is it seen to rise from behind the sacred hill range and skim the horizon for four hours till it gently sets again behind the Harris hills. This range of hills are as much a part of the monuments as the stones themselves. This landscape is currently under threat from a controversial wind farm development.

No one seemed to take on the mantle of the work carried out by Somerville and Lockyer before him in the years between the wars and beyond. It wasn't until 1963 did a resurgence of interest take place when proffessor Gerald Hawkins of Boston University armed with a computer turned his attentions to Stonehenge. His calculations showed 10 stone alignments to solar azimuths and fourteen to lunar. He also went on to popularise the idea that the 56 holes of the Avbury circle marked the 56 years it takes for the moon to complete it's eclipse cycle. Hawkins also surveyed Calanais and concluded the "Calanais people were as precise as the stonehengers but not as scientifically advanced", not surprising as Calanais pre-dates Stonehenge by 500 years. Hawkins contradicted Sommervilles Pleiades theory and suggested the East row may indicate the Equinoctical moon.

The Hawkins suggestion intrigued me and led me to study the idea in greater detail. After building the table of moonrise positions for a 19 year period I was able to verify their validity by an eyewitness account in 2002. In my opinion it is most likely the East Row was erected to signify the horizon position of the rising Autumnal full moon (Equinoctial moon, the full moon closest to the solar equinox) in other terms and significantly, the harvest moon. The Autumnal full moon occurs at a different date between the months of September and October each year during the moons 19 year cycle. When the full moon rises at an azimuth of 88, 89 degrees it appears in the exact horizon position as indicated by the Stone row, anything else is extremely close, maybe only a moons diameter or two off. Although the marked moonrise position is accurate in the main over the moons cycle there are years where we see a degree or two deviation. Still, these slight deviations are still unmistakable indicators and don't detract from the event it's self. It is all too easy to dismiss alignments with modern day perceptions of precision. We must remember it is the theatre of the event, the play of light and the ceremonial atmosphere created which is significant and not the critical degree of accuracy. I think it's important to recognise that although the builders studied the heavens and constructed their temples in a scientific manner they were constructing places for ceremony and worship and not solely observatories as some exponents of this line of study have previously suggested. Interestingly, we can see dates for several Lunar eclipses (when the earths shadow passes over the moon) we can only speculate what the Bronze age people made of these events. From the table below we can see the whole 19 year pattern of moon cycles and the individual Autumnal moonrise positions including several eclipse events. It is hoped the table will not only provide evidence to support this theory but will also encourage people to visit the site (or any circle across Britain for that matter) during these dates. During a time when calendars were based on lunations we can not ignore the full moons closest to the equionoxes as for many civilisations past and present they have special significance. Note how the azimuth of 88 89 degrees is the average position for the moonrise and how the moonrise occurs just after the sun sets on the opposite horizon.

Summer’s End, a time of festival.

Why would the Autumnal moon be significant to the people who erected the stones? We can find clues to support the idea of a ritual or ceremonial event held at this time of year by looking at other cultural traditions spanning Europe and beyond. Prior to the rise of the Roman empire all calendar systems where based on lunation's, only in the Western world have the lunar cycles been erased from our psyche. This is clearly demonstrated in China. The Chinese Mid Autumn festival to this day takes place at the Equinoctial full moon and is the second most important holiday in China, the Chinese new year being the first. In New Zealand there has been a recent revival of an ancient festival named Matariki, here the combination of the rising Pleiades and the next new moon marks the time of festival and remberance and the start of the Maori New year (May). This festival echoes those of the ancient Celts. There is a Scottish Gaelic word Samhainn or Samhuinn (for the feast). The festival of Samhain is an end of summer celebration and many believe it's the beginning of the Celtic New Year. The Samhainn festival is dedicated to the harvest and the dead and has survived in many guises till this day. We must be careful though, not to directly transpose Iron Age and Medieval Celtic traditions to the Neolithic and Bronze Age periods, evidence shows the Celts appeared as a society a thousand years after the East row of Calanais (Callanish) was erected. What is demonstrated is the importance of the star and moon cycles in fixing annual festivals to cultures around the globe. Even the Easter festival of the Christian religion is aligned to the moon cycles which is why it falls sometime between late March and early April each year. No doubt a throwback to Pagan times before.

The Sun and Moon in a Theatre of Light.

To understand the significance of this event in the yearly calendar we must try to imagine life in the Hebrides 4000 years ago, only by doing this can we begin to understand the hardships and fears people faced. The Bronze age period of stone circle building was a golden era for the Hebrides, a time when it was experiencing a warmer and drier climate than it does today. However, it would be a mistake to imagine life being easy here, the recent discovery of a Bronze Age peat stack discovered on the Isle of Barra paints a picture of life and climate not so different and unrecognisable from now. A Hebridean society, existing as it does today, on the very fringes of Europe.

Summer is at an end, food harvested and safely stored for winter. The mornings grow noticeably colder and days shorten at an alarming rate, a long winter looms ahead. Many families face the coming winter with trepidation, aware not all of them will see the new spring. Have they enough food to survive or will it perish or be stolen, have they harvested enough peat and fire wood to keep them warm, and will their house stand strong, and provide protection through the winter storms the Atlantic Ocean will inevitably throw at them. The Pleiades are spotted in the night sky, a community is busy as it gathers and prepares for a festival as the full moon nears, from miles around whole families make the pilgrimage to the ritual landscape of Calanais (Callanish), a chance to make offerings to the gods and the ancestors in thanks for the harvest and in return for safe passage through the winter. So at Calanais (Callanish) the stage is set, for an hour or so and for a few days every year, a short stone row marks a position on the horizon where the Autumnal full moon rises in opposition to a setting sun in the west, signifying an end to the abundance and richness of summer, hailing the dominance of night over day as winter approaches. At this time Calanais (Callanish) becomes not only the central point of ritual and festivity for the community, but also it would appear the pivotal point around which their deities revolve.

Calanais I (Callanish) Autumnal Full Moon Event
Year	Equioctial Full moon	Moonrise Time	Moonrise Azimuth Degrees	Sunset Time	Lunar Eclipses
2002	20-Sep-2002	7:59 PM	108.00	7:27 PM
	21-Sep-2002	8:05 PM	98.00	7:25 PM
	22-Sep-2002	8:12 PM	89.00	7:22 PM
2003	9-Oct-2003	6:56 PM	90.00	6:34 PM
	10-Oct-2003	7:00 PM	79.00	6:31 PM
	11-Oct-2003	7:05 PM	69.00	6:28 PM
2004	27-Sep-2004	7:23 PM	100.00	7:05 PM
	28-Sep-2004	7:26 PM	88.00	7:03 PM
	29-Sep-2004	7:29 PM	76.00	7:00 PM
2005	17-Sep-2005	7:50 PM	101.00	7:35 PM
	18-Sep-2005	7:53 PM	88.00	7:32 PM
	19-Sep-2005	7:56 PM	75.00	7:29 PM
2006	6-Oct-2006	6:31 PM	84.00	6:42 PM
	7-Oct-2006	6:35 PM	70.00	6:39 PM
	8-Oct-2006	6:40 PM	56.00	6:36 PM
2007	25-Sep-2007	6:54 PM	99.00	7:13 PM
	26-Sep-2007	6:57 PM	85.00	7:11 PM
	27-Sep-2007	7:01 PM	72.00	7:08 PM
2008	14-Sep-2008	7:20 PM	98.00	7:43 PM
	15-Sep-2008	7:24 PM	87.00	7:40 PM
	16-Sep-2008	7:29 PM	74.00	7:37 PM
2009	2-Oct-2009	6:05 PM	90.00	6:52 PM
	3-Oct-2009	6:11 PM	79.00	6:49 PM
	4-Oct-2009	6:19 PM	69.00	6:47 PM
2010	22-Sep-2010	6:41 PM	88.00	7:22 PM
	23-Sep-2010	6:49 PM	79.00	7:19 PM
	24-Sep-2010	6:58 PM	69.00	7:16 PM
2011	11-Sep-2011	7:11 PM	96.00	7:53 PM
	12-Sep-2011	7:21 PM	87.00	7:50 PM
	13-Nov-2011	7:32 PM	78.00	7:47 PM
2012	28-Sep-2012	6:12 PM	90.00	7:07 PM
	29-Sep-2012	6:27 PM	82.00	7:00 PM
	30-Sep-2012	6:42 PM	73.00	6:57 PM
2013	18-Sep-2013	6:55 PM	94.00	7:32 PM
	19-Sep-2013	7:14 PM	85.00	7:29 PM
	20-Sep-2013	7:33 PM	76.00	7:37 PM
2014	8-Sep-2014	7:36 PM	99.00	7:01 PM
	9-Sep-2014	7:59 PM	89.00	7:58 PM
	10-Sep-2014	8:22 PM	81.00	7:55 PM
2015	27-Sep-2015	7:05 PM	91.00	7:09 PM
	28-Sep-2015	7:30 PM	82.00	7:06 PM	Eclipse 1:0am - 6:24am
	29-Sep-2015	7:36 PM	73.00	7:03 PM
2016	15-Sep-2016	7:26 PM	105.00	7:40 PM
	16-Sep-2016	7:49 PM	97.00	7:38 PM	Eclipse 6:00pm -  9:55pm
	17-Sep-2016	8:12 PM	88.00	7:35 PM
2017	4-Oct-2017	6:58 PM	97.00	6:47 PM
	5-Oct-2017	7:17 PM	88.00	6:44 PM
	6-Oct-2017	7:37 PM	79.00	6:42 PM
2018	24-Sep-2018	7:46 PM	103.00	7:16 PM
	25-Sep-2018	8:00 PM	91.00	7:13 PM
	26-Sep-2018	8:15 PM	82.00	7:11 PM
2019	13-Sep-2019	8:20 PM	108.00	7:48 PM
	14-Sep-2019	8:32 PM	100.00	7:45 PM
	15-Sep-2019	8:43 PM	91.00	7:42 PM
2020	30-Sep-2020	7:25 PM	102.00	6:58 PM
	1-Oct-2020	7:33 PM	93.00	6:55 PM
	2-Oct-2020	7:41 PM	84.00	6:52 PM

View Table 1800BC - 1782BC

Do you have knowledge or images of similar events at other sites? or would you like to contribute something to this debate. click here to post your comments and pictures.

 Calanais and the Autumnal Full moon.

Comments
Post your ideas, comments and images here. Stephen Whitehead
The equinox line and the harvest moon
Hi Stephen, just a few comments based on what you have said and on what I know of other sites. You say 'The reality is, to the people who erected the stones the sunset on the solar equinox date wasn't signifiant'.  I don't think this is true at all.  The western setting is an accurate solar line, and equinox lines are known to have been built into some of the other most impressive monuments of the Neolithic in Western Europe, including the passage graves at Knowth (both rise and set) and Loughcrew's Cairn T in Ireland.  In fact, Martin Brennan makes the observation that equinox sites always have independent indications of a north-south line too, which is exactly the case at Callanish. The issue with the theory of an indication of the harvest moonrise (anywhere, not just as Callanish) is that it is not an extreme or limiting position, and as your own table shows, its range of azimuths/declinations over the course of several years is radically different. The moon's diameter is only half a degree, so the difference between the rising position of the equinox moon you saw in 2002 and the following year's equinox moon, from your own table, is twelve degrees, or 24 moon widths.  I think it is hard to argue that the western line at Callanish is meant to indicate this event, when it hardly ever points to it, even vaguely. Unless, of course, it was the rarity of the event that was the point of the erection of the western line - the occasional coincidence of the equinox sunset at the eastern line and harvest moonrise at the western line.  Since countless megalith sites indicate an even rarer event, the lunar extremes, this might be possible. Cheers Robert Pollock, Otago, NZ Robert Pollock
Knowth
OK, after further reading I can see that I was wrong about Knowth - eastern passage is at about 85 degrees, not an equinox line.  I'm not the only one to notice the similarity of Callanish with Knowth -Victor Reijs thinks they both indicate 'equinox like events' - http://www.iol.ie/~geniet/callanish/eng/eastwestknowthcalanais.htm Robert Pollock
2 moons width (1 degree)
Robert, you're right, that was rather a sweeping statement, about the solar equinox date, the west row is an accurate solar alignment. It should read to the people who errected the East row. But it does beg the question if we already have a true solar West/East alignment why is the East row necessary? It must have some other significance don't you agree? In reply to your other comments, I ask you again to take another look at the table, for I fear you have misread the data, maybe my table isn't as clear as it should be. The 12 degrees  or 24 moon widths you mention is in fact only 2 moon widths (1 degree) which is pretty dam close in my experience. I see your mistake - you have read the sunset azimuth and not the moons, I'll amend the table to make it easier to interpret.  Martin Brennan observation may be valid but what does that tell us? Are we to suppose the whole site at Calanais conforms to a plan laid down at the outset around 3000BC which took near on 2000 years to complete? It seems more likely the rows and avenues are additions to an adopted site as people and ideas migrated Northwards.   Thanks again for your comments and contribution it's most helpful. Stephen
My Calanais discoveries
Hello Stephin. My name is Richard Neil MacLeod and live in Oregon, USA, and am a retired Electronics Engineer. On a visit to Calanais I was told by other Macleods that it was a star. On return home I decided to research this and possibly right a book about it. I did discover how it is a star and have made sketches and drawings over photos to show how they made a star of the circle and avenue. I have also made other discoveries about Calanais and how many of the old places have a common connection. And that the carvings in the old stones are actually a language that we can read. Would you be interested in this? You can contact me at macleod@centurytel.net in the USA. Richard N. MacLeod
CALLANISH STONES
MORE THINGS ON CALLANISH STONES!!! Joanne
a question
Stephen, thanks for the site, interesting ideas. Please could you explain your dating of the main site- the order you give for their erection, with the central first, ring, north south and west and finally east around 1800BC, along with the tomb. Patrick Ashmore doesnt seem so certain in his guidebook although he obviously has more information than he presents.. thanks, Ian ian