Moon phases and circuit through the sky
In this short video, Anthony Murphy of Mythical Ireland demonstrates (using the free Stellarium program) how the moon moves through phases as it makes a circuit of the sky each month.
This video accompanies a comprehensive article about how the 19-year Metonic Cycle of the moon would have been observable in the Neolithic. See the article (and other videos) here:
https://mythicalireland.com/blogs/ast...