Concern. An instrument or act built to receive — not represent — something absent across distance.
Position on the concrete↔impossible spectrum. Full-spectrum. Concrete pole: Big Art Dish, a working, real-budget proposal for a radio-telescope-as-sculpture. Impossible pole: The Ghostly Medium, THICK_AIR and Demonology, where reception has no verifiable channel at all.
Primary texts. Big Art Dish — A Report and Proposal · The Ghostly Medium · THICK_AIR · Demonology
Title is THICK_AIR’s own full title. Authored in full (R2, 2026-09-05).