This star wasn't detected and charted by the Seed ships. When Destiny flew near it, the gravity of the star disrupted its Faster-Than-Light engine, causing the ship to drop out of FTL and spend the next month maneuvering around it to get back on course.
This star is a yellow dwarf similar to the Sol. There is only one planet orbiting it. Dr. Nicholas Rush speculated that both the star and planet were created artificially by a very advanced race, though not likely the Ancients due to the writings on the orbiting planet. This conclusion was based on the fact that the star is brand new and the planet that orbits it already has complex plant life. Several Tau'ri aboard Destiny believed that the star and the planet might have therefore been created by a "higher force" (God). Though most believe in both. (SGU: "Faith")