Jamus' homeworld is a planet in the Pegasus galaxy. The planet had at least one asteroid-like moon, which was hollowed out and made into a Moon Base. A while ago, the planet was home to a race of humans, whose technology are comparable to the 1960s on Earth.
The planet was abandoned due to a Wraith attack, with at least 1,000 of the original inhabitants taken to a pattern storage module in an orbiting Moon Base, while the rest were killed and destroyed, many by the human's own atomic weapons, which wiped out the remaining Human population as well as the attacking Hive ships.
This planet is notable for being one of the two known unprotected Pegasus galaxy human civilizations that was able to achieve spaceflight, the other being the Travelers.