When Neil DeGrasse Tyson makes a guest appearance on the show, why is Sheldon mad at him?
Answer Tyson helped get Pluto demoted.
It was a real treat to fans to see Tyson make a cameo. Sheldon was less than thrilled because Tyson helped get Pluto demoted from being a planet.
Asked by Mike Bedard · Last updated 5 years ago · 367.5K views · SOURCE
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