There are 10 seasons of Stargate SG-1. In fact, it has the record of being the longest running scifi show.
Two.
There is 48 goa'ulds in stargate sg-1. Here is a list of goa'ulds: Anubis (P.S: He is half-Goa'uld half-Ancient) Apophis Ba'al Cronus Nirrti Osiris Ra Sokar Tanith Yu Amaterasu Ares Athena Bastet...
No Stargate SG-1 ended in season 10.
10 seasons (it is finally being cancelled in 2011)