black knight satellite

There are around 3000 human-made satellites in working order around the Earth, however if the debris of old and damaged satellites are taken into account the number increases dramatically. Ever since the Soviet Union launched the very first artificial satellite into orbit in 1957, various countries around the world have sought to compete and satellites today are used for communication, navigation and exploration. Satellites are often visible passing overhead as the sunlight reflects back towards the Earth. One of them is impossible to miss, the largest satellite currently in orbit, the International Space Station, at a huge 100m across. However, these satellites are relatively unexciting in comparison to the mystery surrounding one very old dark satellite