Adara System
From The Stargate Omnipedia
Star system in our galaxy where the Asgard Heimdall used the second planet to conduct research on his people's ancestry. They chose our galaxy because it was out of the way of the Replicators, and the gaseous planet disguised the lab from the Goa'uld.
KEY EPISODE
Revelations - SG-1 travels to the Adara system to meet with the Asgard Heimdall.