Mysterious light seen in Athis-Mons

Summary

On August 29, 2008, a witness in Athis-Mons observed a very bright white light in the northwest. At first, it seemed like a star, but its behavior caught attention. The light moved slowly, stopped, and disappeared within about six seconds. However, there were no other witnesses or additional records. The GEIPAN report points out that the description is inconsistent: sometimes it mentions a fixed movement followed by a slight acceleration, other times a slow movement toward the north. Moreover, the witness reported the incident almost 18 months later, which complicates the reliability of the details. The GEIPAN concluded that there is not enough reliable information to rule out conventional explanations, such as a star or a Thai lantern. Therefore, the case was classified as "C" due to lack of conclusive data.