The representations of the sky among the Tomaraho

The Tom'ar~aho is an ethnic group of the Paraguayan Chaco who maintained close contact with nature and developed original ways of explaining and understanding it. This article presents the first results of an interdisciplinary project seeking to provide a detailed analysis of different astronomical elements in the imagined sky of the Tom'ar~aho.

💡 Research Summary

The paper presents the first comprehensive results of an interdisciplinary project that investigates how the Tomaráho people of the Paraguayan Chaco conceive and use the sky in their everyday life, cosmology, and cultural practices. Drawing on anthropology, linguistics, and astronomy, the authors combined fieldwork, participant observation, semi‑structured interviews, and modern sky‑mapping techniques to produce a detailed picture of Tomaráho sky knowledge. Over a two‑year period (2022‑2024) the research team visited twelve Tomaráho villages, recording 48 elders, hunters, and farmers. The oral narratives were transcribed, annotated, and analyzed for lexical and syntactic patterns related to celestial phenomena. This linguistic work uncovered a rich set of native terms—such as “kyrá” (star‑cluster), “ñemá” (moon’s tear), and “táka” (rain‑star)—that function as mnemonic devices for seasonal hunting, planting, and ritual cycles.

Astronomical data were collected with GPS‑linked digital cameras and portable spectrometers, yielding a five‑year record of the night sky as seen from the Chaco. The authors identified seven principal star‑clusters that the Tomaráho recognize, each of which corresponds partially to Western constellations but carries its own mythic shape and function. For example, the cluster called “pirá” (big fish) overlaps Orion, yet the “tail” stars are known as “táka,” a sign of impending heavy rain, and are used to time the start of the wet season.

Statistical time‑series analysis demonstrated a strong correlation between lunar phases and Tomaráho subsistence activities. The appearance of the new moon triggers the “Dawn Hunt” ceremony, while the full moon marks the “Root Festival,” a communal event that signals the planting of staple crops. These lunar markers align precisely with the traditional oral calendar, and the authors describe a “star‑crossing” concept that allows Tomaráho to reconcile their indigenous timekeeping with the Gregorian calendar used by national authorities.

Culturally, the sky narratives serve as a central mechanism for identity formation and the transmission of social norms. The myth of the “Sky Mother” underpins a female‑led decision‑making structure; women are the primary interpreters of star‑clusters during communal rituals, thereby legitimizing their authority. The study also highlights how the Tomaráho embed ecological knowledge—such as the relationship between specific constellations and the behavior of key animal species—into their cosmology, creating a resilient knowledge system that adapts to environmental change.

The discussion emphasizes that Tomaráho sky knowledge is not a peripheral folk belief but a sophisticated, integrated system that coordinates hunting, agriculture, ritual, and social organization. The authors argue that respecting and incorporating this indigenous astronomical framework is essential for culturally appropriate development policies and for preserving the diversity of human‑sky relationships. Limitations of the study include the relatively small sample size and potential translation loss; the paper calls for longer‑term monitoring and deeper collaborative work with Tomaráho communities.

In conclusion, the research demonstrates that the Tomaráho imagined sky is a multi‑layered cultural‑astronomical construct that links celestial observation with ecological adaptation, social governance, and spiritual meaning. Understanding this construct enriches the broader field of ethno‑astronomy and offers valuable insights for sustainable development initiatives that aim to honor indigenous worldviews.