Can I ask how everyone personally feels about using nuclear material for space exploration? For the rovers heating elements it will be just a couple of grams but for generating electricity via a RTG a spacecraft would require several kilograms of radioactive material.
Don’t worry too much about it: it’s not the 80s and we’re not the Soviets.
Once it’s in orbit it doesn’t matter and if there’s issues during ascent the source will be hardened to prevent catastrophic release.
Realistically though, just send it up on a falcon 9, the track record on those things is _ astounding_.