Experience the heliacal rising of Sirius

On 15 August 2018 during a summer camp we organized high up in the mountains, I took a group of participants to witness the heliacal rising of Sirius. The event marks the star’s first appearance in the morning sky after a period of time spent hidden behind the Sun. In Ancient Egypt, the event marked the beginning of the year and occurred earlier, around the summer solstice (20/21 June). Due to precession it now takes place 2 months after. The intention was to see how many of us can actually see it. I can still remember the reaction of one of them as she said to me: based on what you were telling me I thought it would be something spectacular, instead it twinkled faintly for a few moments and it disappeared into the sunshine as quickly as it appeared. But it was enough for our ancestors to know the new year has arrived!

Heliacal rise of Sirius and Orion in August.
The heliacal rise of Orion (you can clearly see the belt as the three almost vertical lines upper right) and Sirius (the bright star near the pyramid-shaped tree (center right on the horizon).

August also coincides with the reappearance of the Orion constellation in the morning sky. As months pass the constellation will rise into the night sky and dominate the winter skies.

Image of the heliacal rise of Orion.
The heliacal rise of Orion on 15 August 2018. Can you spot the belt in the center of the image?
The heliacal rise of Sirius. Can you spot it as a faint white spot between the two mountain peaks in the center of the image? Try saving the image and zooming in. (High-resolution image 4928×3264 pixels)

Not as impressive as a sunrise but something that our Egyptian ancestors awaited each year patiently as it marked the start of the rainy season, the flooding of the Nile, and a rich harvest. Of course, there was no way for them to know that in fact, the African rainy season was beginning close to the source of the Nile.

Not satisfied with what the ancient gods had stored for them they decided to have their own heliacal rise close to a stone circle we have built to learn more about the process. More about that in a future post.

A custom made more impressive heliacal rise of Sirius.
A more impressive heliacal rising of the “Sirius” orange.

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