> There's also a nice picture of one deployed on the moon. That was also one of the many issues that cropped up during Apollo 13. They too had an RTG on board

> There's also a nice picture of one deployed on the moon. That was also one of the many issues that cropped up during Apollo 13. They too had an RTG on board that was supposed to stay on the moon[1]. According to the book "Lost Moon" by Lovell and Kluger, a potential explosion of the Saturn V during launch was accounted/planned for, but the RTG "coming home" together with the LEM wasn't. IMO the book was a bit hazy on how that situation was addressed exactly, but according to Wikipedia that RTG is currently resting somewhere deep in the Pacific[2]. Also an interesting read on that topic is the SNAP program itself that developed the technology in the first place, even shot entire mini-nuclear-reactors into earth orbit[3] and resulted in some stereotypical 1960s nuclear safety shenanigans/mishaps during testing[4][5]. [1] https://en.wikipedia.org/wiki/Apollo_13#Experiments_and_scientific_objectives https://en.wikipedia.org/wiki/Apollo_13#Experiments_and_scie... [2] https://en.wikipedia.org/wiki/Apollo_13#Reentry_and_splashdown https://en.wikipedia.org/wiki/Apollo_13#Reentry_and_splashdo... [3] https://en.wikipedia.org/wiki/Systems_for_Nuclear_Auxiliary_Power https://en.wikipedia.org/wiki/Systems_for_Nuclear_Auxiliary_... [4] https://en.wikipedia.org/wiki/SNAP-10A#Safety https://en.wikipedia.org/wiki/SNAP-10A#Safety [5] https://en.wikipedia.org/wiki/Systems_for_Nuclear_Auxiliary_Power#SNAP-9 https://en.wikipedia.org/wiki/Systems_for_Nuclear_Auxiliary_...