Dash came up with another, simpler idea. His study suggested that the Egyptians roughly 4,500 years ago could have used the autumnal equinox to achieve perfect alignment.the moment twice a year when the plane of Earth's equator passes through the centre of the Sun's disc, and the length of day and night are pretty much equal.
Previously equinox measurements had been overlooked as a possible alignment method, as it was assumed it wouldn't provide enough accuracy.To figure this out, Dash actually did his own experiment, starting on the first day of the fall equinox in 2016 – 22 September 2016 – and using a gnomon to cast a shadow.
He tracked the point of the shadow at regular intervals, forming a smooth curve of points. And at the end of the day, with a taut piece of string wrapped around the pole, he intercepted two of the points of the curve and created an almost perfect line running east-west.
"The Egyptians, unfortunately, left us few clues.
And monkeys might be flying out of my butt