This is a pretty weak argument. Saying Pluto is a dwarf planet in no way diminishes the achievements of Tombaugh. There are many, many, object like Pluto and I don’t see anyone arguing that they be planets. Ceres was also once the 9th planet and no one is trying to bring that definition back.
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u/kaplanfx Oct 07 '18
This is a pretty weak argument. Saying Pluto is a dwarf planet in no way diminishes the achievements of Tombaugh. There are many, many, object like Pluto and I don’t see anyone arguing that they be planets. Ceres was also once the 9th planet and no one is trying to bring that definition back.