An almost entirely extinct race of humans from the planet Talthus, a world that has long since been destroyed by a solar flare caused by a dark star. To save the race from total annihilation, the population held a lottery to determine who would escape the radius of the destructive force. All Sovereigns, the leaders of Talthus, were chosen, as well as one family member of each crew member serving aboard the escape sleeper ships.
Three vessels including the Stromos escaped the flare's radiation before it reached their world, leaving roughly 3,000 Talthuns alive in stasis units on a course for the world of Ardena, hundreds of years away. But the Stromos crashed on P2A-347 and was discovered by SG-1, who promised to help the survivors find a new world -- or perhaps Ardena itself.
It is unknown whether the other two sleeper vessels reached the Talthuns' new homeworld safely.
Lifeboat - SG-1 finds a crashed ship filled with cryogenic sleep chambers, some one-third of the surviving Talthun species.