Main video: https://youtu.be/SumDHcnCRuU
Mercury is the closest planet to all seven other planets: https://www.youtube.com/watch?v=GDgbVIqGADQ
https://physicstoday.scitation.org/do/10.1063/PT.6.3.20190312a/full/
Is Pluto a Planet: https://www.youtube.com/watch?v=Z_2gbGXzFbs
Discuss on the reddit: https://www.reddit.com/r/CGPGrey/comments/dp5tx6/which_planet_is_closest/