Original: Heavens Above: Spacecraft escaping the Solar System May 20, 2008, Week Ending May 25 2008 At this distance, it is farther away from the Sun than any known natural solar system object, including Eris and 90377 Sedna, but excluding long-period comets.
Simplified: At this distance, it is more distant from the Sun than any known natural solar-system object, including 90377 Sedna.