this post was submitted on 05 Aug 2025
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Isn't it illegal to transport fissile material into space?
Pretty much every inter planetary satellite has a reactor for power. Not all reactive material is considered fissile.
This is changing as solar panels get lighter and more efficient. Galileo studied Jupiter in the 90s and was powered by an RTG, but Juno and Europa Clipper are both using solar panels to study the same body.