On September 15, 1991, between 20:30 and 20:45 Greenwich Mean Time, the TVcamera located at the back of Space Shuttle Discovery's cargo bay was trainedon the Earth's horizon while the astronauts were occupied with other tasks.A glowing object suddenly appeared just below the horizon and "slowly" moved from right to left and slightly upward in the picture. Several other glowingobjects had been visible before this, and had been moving in various directions.Then a flash of light occurred at what seemed to be the lower left of the screen;and the main object, along with the others, changed direction and accelerated away