Are there long-term processes invisible over short spans? And if so, how might they relate to the loci of long-term social change, those performative or practical moments wherein agents enact, embody, or otherwise engage traditions, landscapes, or structures? Here, we are particularly concerned with the experience of starry skies as these were historically reckoned through cluttered object fields and cosmic events. These are key to understanding the emergent properties of ethnoastronomies and cultural landscapes that, in certain moments, may be described as leading to historical conjunctures.