wooslers2

What is NASA doing to address the shortage of plutonium 238 used to power missions such as the Curiosity rover and Voyager deep space probes? Are there any alternatives to radioisotope generators that can be pursued?

Unfortunately the wrong isotope of plutonium. Radioisotope generators use the non-fissile isotope Pu-238. Weapons' grade plutonium is predominantly Pu-239. We definitely have a lot of that lying around. ;)

Thank you. :)