Walter's world

"Since when are we calling it Walter's World?" "Since I came through the gate first. It's kind of how it's done." "Says who? By that rule, almost every planet in the Milky Way would be called O'Neill or Carter!"

- Chuck and Norman Walter Davis Harriman

Water's world was a planet in an unknown galaxy, with an older, unfamiliar Stargate.

Overview
Walter's World had a moon that collided with the planet, destroying both.

The planet's population consisted of various different creatures that were aggressive predators.

2009
In 2009, Walter and Chuck went through Atlantis' Stargate to Earth; however during the transition their patterns dropped off and the two instead found themselves on an Unknown planet.

The Stargate they came through was older and an unfamiliar model. They searched the planet for a month and couldn't find a Dial Home Device.

During the month, Walter kept track of the planet's quakes, discovering that they were getting stronger, more frequent and closer together. That, combined with the planet's moon appearing closer, Walter figured out the moon was going to collide with the planet.

The moon's collision course began to quicken and soon the planet began to break apart. Eventually the two collided and the planet was destroyed, but just before it's destruction an Ancient remote control was found, which let Chuck and Walter gate off the planet just in time.