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In the wake of the Cold War, the U.S. stopped producing its own plutonium, a small usage of which is to power spacecraft and that had consequences for science.

Johns hopkins universityUnited statesNew horizonsJune zakrajsekAbigail rymerTracey bishopGlenn research centerWhile the department of energyDepartment of energyJohns hopkins university applied physics laboratoryPlanets assessment groupCold warOuter planets assessment groupRadioisotope power systemsNew frontiersGeneral purpose heat source