The uranium processing tree is, in my opinion, one of the most interesting parts of Factorio. It's a shame that it's relegated to side-content. This mod tweaks the recipe of the Satellite to incorporate Uranium, so that those patches you keep finding actually end up being important. The material costs of the RTG have been subtracted from those of the Satellite, so overall resource consumption is exactly the same apart from the added Uranium.

Also vaguely realistic! Their compactness and long life make Radioisotope Thermoelectric Generators a popular choice in rovers, satellites and submarines.