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November 2015 – Moonrise at the Octagon Earthworks in Newark, Ohio

You are invited to see the moon rise in alignment with the Octagon Earthworks. You have the opportunity to be one of few people who have experienced this event in many centuries.

Join us on either of two evenings: Friday, November 27 or Saturday, November 28. Bring you family and friends. You will be the guest of The Ohio State University’s Newark Earthworks Center and the Ohio History Connection.

Moonrise at the Octagon Earthworks in Newark, Ohio, Thursday, Nov. 26, 2015. Moon images were taken at three-minute intervals beginning at 6:25 p.m. (Photo by Timothy E. Black)

We will see a northern minimum moonrise at this amazing site built by ancestors of American Indians two thousand years ago. Here is what it looked like earlier this fall:

Plan to arrive at the Octagon at 6:15 pm on Friday, November 27 and to leave by 7:45 — or on Saturday, November 28 to arrive at 7:15 and leave by 8:45.The Octagon is at 125 N. 33rd Street in Newark, Ohio. Park in the parking lot and gather at the large sign  next to the parking lot. Bring a flashlight. If the weather seems to threaten the event, call  740-364-0584 on either of these days for an update.The moon follows an 18.6 year cycle.  The Newark Octagon, built two thousand years ago by ancestors of today’s American Indians, aligns with eight “standstill points” in the cycle of the moon.

Those who built the Octagon understood that every month the place on the horizon where the moon first rises moves south for roughly 14 nights and then returns again. Further, the distance it moves between the first and 14th night grows greater every month for 9.3 years and then shrinks again until it is the same distance it had been at the beginning.

These ancient America Indians identified four “standstills” points  where the rising moon seemed to stop going in one direction and began going in the other: the northernmost rising of the moon and the southern-most,  the northern minimum and the southern minimum. They also observed another four times when the setting moon did the same:  the northernmost and southernmost moonset, the northern minimum and southern minimum  moonset.

Although the moon arrives at each of these standstill points only once every 18.6 years, it is very close to each of them on several nights. November 27 and 28 are the last dates on which we are likely to see the northern minimum moonrise for the next 18.6 years.