stargate sg 1 follow and expand upon the egyptian mythology present in stargate . in the stargate universe and human be enslave and transport to habitable planet by the goauld such a ra and apophis . for millennium and the goauld harvest humanity and heavily influence and spread human culture . a a result and earth culture such a those of the aztec and mayan and briton and the norse and mongol and greek and and roman be find throughout the know habitable planet of the galaxy . many well known mythical location such a avalon and camelot and and atlantis be find and or have at one time exist . presently and the earth stargate ( find at a dig site near giza in 1928 ) be house in a top secret u. s. military base know a the sgc ( stargate command ) underneath cheyenne mountain . col. jack oneill ( anderson ) and dr. daniel jackson ( shank ) and capt . samantha carter ( tap ) and tealc ( judge ) compose the original sg 1 team ( a few character join and or or leave the team in late season ) . along with 24 other sg team and they venture to distant planet explore the galaxy and search for defense from the goauld and in the form of technology and alliance with friendly advanced race . the parasitic goauld use advance technology to cast themselves a egyptian god and be bend on galactic conquest and eternal worship . throughout the first eight season and the goauld be the primary antagonist . they be a race of highly intelligent and ruthless snake like alien parasite capable of invade and control the body of other specie and include human . the original arch enemy from this race be the system lord apophis ( peter williams ) . other system lord and such a baal and anubis and play pivotal role in the late season . in the ninth season a new villain emerges and the ori . the ori be advanced being with unfathomable technology from another galaxy and also bent on galactic conquest and eternal worship . the introduction of the ori accompany a departure from the primary focus on egyptian mythology into an exploration of the arthurian mythology surround the ori and their follower and and their enemiesthe ancient .