What event led to the demotion of Pluto from planet to dwarf planet?
A)The determination of Pluto's mass
B)The discovery of Mercury
C)The discovery of a tenth body that is larger than Pluto
D)The discovery of additional satellites of Pluto

Question

Quizplus · Accepted Answer

The discovery of Eris, a celestial body larger than Pluto, led the International Astronomical Union (IAU) to redefine the criteria for planet status in 2006, resulting in Pluto's reclassification as a dwarf planet.

What Event Led to the Demotion of Pluto from Planet