The Celestial Archive is a decentralized network documenting the Arctic’s fading night sky due to humidity and light pollution. The project operates across three scales: an Inuit hunting refuge in Greenland measuring starlight scattering, a Sámi migration outpost near Kiruna monitoring skyglow, and a central hub in Tromsø. Inspired by the “Reindeer Huddle,” the Outposts adopt a crescent-shaped spiral to create a thermal micro-climate. The architecture employs a layered logic—from outer snow fences to an insulated core—mimicking traditional Arctic survival. These structures serve as both scientific instruments and shelters for herders. In Tromsø, the Civic Archive calibrates this remote data, pairing scientific measurements with Indigenous oral histories and migration records. By synthesizing technical datasets with lived evidence, the Archive preserves a shared record of the changing Arctic environment for future generations.