It remains one of the loveliest and first astronomical interpretations in human history to survive including the few days where the Sun is lost to the glare of the Sun (new moon) or when the moon have moved to a position between the Earth and the stationary Sun in it's monthly circuit. The stone itself is part of the structure with an Equinox alignment where there is no roofbox as it is impractical that time of the year (September/March) when solar declination is far too rapid.
The circle turns as Mercury passes out Venus as both move in opposite directions in their smaller and faster circuits around the Sun -
In a line-of-sight view from a slower moving Earth Venus will continue it's journey into the Sun's glare as it overtakes the Earth while Mercury moves in the opposite direction (by scrolling the dates forward) with a conjunction on May 22nd -
In a week or so, Venus will enter the view of the Lasco 3 camera and the glare of the Sun -
I love what the ancient people on this island could do while contemporaries have lost their ability to interpret planetary motions. The fact that I post this in an archaeology forum is proper as the methods and insights of those great astronomers have been lost to those who have absolutely no perceptive insights.