As a result, the California Institute of Technology's Professor Mike Brown, who led the team that found Eris, has since been named "the man who killed Pluto." Worried that we might end up with too ...

Best known for driving demotion of Pluto to dwarf planet, astronomer Mike Brown discusses the next horizons in our solar system, including the hunt for the elusive Planet 9. This article was ...

In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the ...

Gonggong is a dwarf planet and a member of the scattered disc beyond Neptune. As of 2019, its distance from the Sun is 88 AU, and it is the sixth-farthest known Solar System object.