Image credit: compiled from NASA public images At times, people still express bemusement, or confusion, that Pluto was reclassified as a "dwarf planet", after having been considered a full-fledged planet for the better part of a century. One thing I always point out to them is that we're discovering more and more roughly Pluto-sized bodies. If we call them all planets, the list of planets would rapidly grow unmanageable! (Do you want to memorize the names of 20 planets? How about 80?) Today the list just got bumped up by one. Meet Makemake, the first body in our solar...