UFOs in Earth Orbit during Space Shuttle Mission Discovery STS-48 in 1991.\rbr\rbrUFOs in Earth Orbit during Space Shuttle Mission Discovery STS-48 in 1991.\rbr\rbrUFOs in Earth Orbit during Space Shuttle Mission Discovery STS-48 in 1991.\rbr\rbrOne of the most spectacular video footage of a UFO encounter was taken by cameras on board the Discovery space shuttle, STS-48, on 15 September, 1991.\rbr\rbrAmazing NASA UFO footage from the STS-48 Incident. Taken while in orbit on 15 September 1991 the video shows a flash of light and several objects that .