A striking 1972 blue-engraved commemorative from Correos de Chile, this stamp honors the Cerro Calán Observatory, one of Chile’s foundational astronomical research centers operated by the Universidad de Chile. The design features a detailed rendering of a large optical telescope in the foreground, with the observatory dome, laboratory buildings, and the Andes mountains in the background. A sweeping comet or meteor trail arcs across the night sky, emphasizing Chile’s long-standing role in global astronomy.
Printed by Casa de Moneda de Chile, the issue is popular among collectors of space, science, and Latin American postal history.