The Concorde UFO Photograph (1973)
On June 30, 1973, Concorde 001 flew at Mach 2 over Chad to chase the century's longest total solar eclipse, giving an international team of scientists 74 minutes of observation. While developing the thousands of photos taken during the mission, three expedition members discovered a picture showing an unidentified object near the black sun.
Witnesses
Scientific crew, Concorde
Why it endures
An elite scientific mission, equipped with cutting-edge instruments, that unwittingly captured an object it wasn't looking for.
Official version (contested)
Accepted explanation: a meteor swarm active that day over Africa, whose trajectory would match the photographed object.