You may recall ( as I and my offspring do ) the controversy about six years ago around the demotion of Pluto. There seemed to me to be reasonable arguments on both sides, and indeed, my household included pro-Pluto partisans and partisans for a new, clear definition of “planet” that might end up leaving Pluto on the exo-planet side of the line.
At the time, Neil deGrasse Tyson was probably the most recognizable advocate of the anti-Pluto position, and since then he has not been shy about reaffirming his position. I had taken this vocal (even gleeful) advocacy as just an instance of a scientist working to do effective public outreach, but recently, I’ve been made aware of reasons to believe that there may be more going on with Neil deGrasse Tyson here.
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