The Solar System With the Most Planets Is Now ... HD 10180

It’s a shame about Pluto. Now that the astronomical community has downgraded the once-furthest planet from the sun to non-planet status (technically it’s now referred to as a protoplanet or dwarf planet), our solar system is at risk of being unseated as the largest known planetary system in the universe. An astronomer at the University of Hertfordshire has revisited data related to nearby star HD 10180 and discovered that it very likely has nine planets, making it the most populous known solar system.