Lantean observation satellite

An Ancient observation satellite is one satellite in a network in orbit of several planets throughout the Pegasus galaxy that track the development of human civilizations. Each satellite is controlled by a computer terminal on both the planet and at the location of observation. Rodney Mckay and Col. Sheppard discovered one such terminal in Atlantis and mistook it for a fiction game. However, upon a routine survey mission, an SG team arrived at a planet being controlled by these satellites and determined that and all the people in them, are real; living on a planet somewhere in the Pegasus galaxy.