GENERAL KNOWLEDGE

Detailed explanation-1: -If there’s a bright side to Pluto’s reclassification as a dwarf planet, it’s this: the change was prompted by the discovery of three additional space neighbors, Eris, Haumea, and Makemake, which hang with Pluto in trans-Neptunian orbit.

Detailed explanation-2: -The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one-it “has not cleared its neighboring region of other objects.”