An archaeoastronomical theory has been that the alignment of these circles was for viewing astronomical events from within the circle. Because it had previously been thought the central cairns had been built after, maybe long after, the circle there would have been a space inside for people to congregate. Following Bradley's discovery that in this case, and others, the cairn predated the circle, it is now according to Ruggles difficult, if not impossible, to observe the moon in the way we have described. There remains the idea that the alignment with Lochnagar on the far horizon was intentional but Henty remarks that the recumbent gets in the way of a view of the mountain from the opposite side of the circle.