Archaeologists in Peru have uncovered a sophisticated observatory believed to have been used for astronomy at the ancient site of Aspero, offering new insight into early scientific practices in the Americas. The discovery was confirmed by the Ministry of Culture through the Caral Archaeological Zone, which oversees research in this Peruvian region.
Aspero is part of the Caral Civilization, a coastal society that flourished between 3000 and 1800 BC and is considered one of the oldest in the Western Hemisphere. According to researchers, the newly identified structure was carefully designed to monitor celestial movements, including the Sun, Moon, and stars. The research team, led by archaeologist Ruth Shady Solis, suggests that trained observers used the space to track seasonal cycles that were essential for survival.
Excavations in a sector identified as J1 revealed that the structure is positioned near major pyramidal complexes, with clear views of both the Pacific coastline and the Supe Valley. This strategic placement likely allowed inhabitants to observe environmental patterns alongside astronomical changes.
A structure that evolved over time
Detailed analysis shows that the building underwent several phases of construction, reflecting shifts in its purpose. In its earliest form, the site appears to have functioned as a communal or ceremonial space.
Later modifications introduced an oval platform about 3.18 meters in diameter, featuring a central upright stone known as a huanca. Such stones are commonly associated with ritual activities in ancient Andean cultures, indicating that ceremonial practices became more prominent over time.
Subsequent expansion transformed the structure into a two-tiered platform. The lower level extended roughly 9.4 meters across, while a smaller upper platform was added above it. At the center, archaeologists found a rectangular stone and a nearby hearth, suggesting that rituals tied to natural and celestial cycles intensified during this phase.
Eventually, the structure was covered and repurposed into residential areas. Researchers interpret this change as evidence of broader social and functional shifts within the community, marking the decline of its specialized use.
Coastal hub of knowledge and exchange
Located about 700 meters from the Pacific Ocean, Aspero spans nearly 19 hectares and contains 25 architectural complexes. The settlement is widely recognized as a key hub for fishing and trade, supported by its proximity to marine resources.
The discovery reinforces the idea that Áspero was more than an economic center. It also served as a place where knowledge of astronomy and environmental patterns was developed and applied. This understanding would have helped residents predict tides, manage fishing activities, and coordinate exchanges with inland farming communities.
Ongoing studies, including radiocarbon dating and architectural assessments, aim to refine the timeline of the structure of this ancient observatory of astronomy in Peru and clarify its role within the broader Caral network. Researchers believe the findings contribute significantly to the understanding of how early societies combined observation, ritual, and practical knowledge to adapt to their surroundings.