NASA and the Department of Energy (DOE) are working together to enable more space missions through the development of Dynamic Radioisotope Power Systems (DRPS) that utilize moving parts to generate a current. NASA is working to achieve efficiencies in DRPS on the order of 3-4 times greater than the current state of the art RTG. This increase in efficiency provides more power per kilogram of generator mass. This means that a mission could have more power and potentially use less of the radioisotope fuel, limiting the amount of radiation and waste heat that they produce. These options make a DRPS ideal for certain human exploration missions and a viable option for specialized science missions.