Claim: The Peñasco Blanco was recorded to be constructed between AD 900 and 1125, which is near a cliff painting that may have recorded a sighting of a supernova, a powerful and luminous stellar explosion that occurs during the last evolutionary stages of a massive star.
Evidence: The building was constructed in five distinct stages between AD 900 and 1125. A cliff painting (the "Supernova Pictograph") nearby may record the sighting of a supernova on July 5, 1054 AD. A supernova (/ˌsuːpərˈnoʊvə/ plural: supernovae /ˌsuːpərˈnoʊviː/ or supernovas, abbreviations: SN and SNe) is a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion.