The Edora system is a star system in the Milky Way galaxy with at least five planets, including Edora, orbiting a star. Each year, a meteor shower, known locally as "fire rain", occurs as Edora passes through the edge of the system's asteroid belt.
Major Samantha Carter made an observation of the asteroid field and found that every 130 years, Edora passes through a part that has particularly large asteroids, some of which hit Edora directly with ground impacts. Dr. Daniel Jackson studied the geology and confirmed this. (SG1: "A Hundred Days")