Atmospheric re-entry of 5 November 1990

Summary

On 5 November 1990 at 8 p.m. the CNES was flooded with calls from gendarmeries across France reporting a luminous phenomenon that crossed much of the country. Astronaut Jean-Pierre Haigneré was among the witnesses. At Aire-sur-Adour a balloon launch was even postponed to observe it. Within a week NASA confirmed it was the atmospheric re-entry of the Soviet GORIZONT 21 platform, and CNES orbital data matched the testimonies, tracing a trajectory from the Bay of Biscay to Alsace.

Many witnesses described a dark object with multiple lights at low altitude, but this was explained as an optical illusion: the intense brightness of the burning fragments causes the brain to perceive them as much closer than they are. Some observers rejected the official explanation, struck by the vividness of the experience. GEIPAN classified the case as A, attributing it to the re-entry of a Proton rocket third stage.