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The Power to Explore Challenge named winners in grades K-4, 5-8 and 9-12 for writing a plan for a mission to any moon in the solar system using radioisotope power systems.—Suzanne Wright, USA Today, 14 Oct. 2025 Iodine radioisotopes have half-lives that span from a tenth of a second to 16 million years.—Andrea Richard, The Conversation, 2 Oct. 2025 So far, radioisotope power systems (RPSs) in space have utilized plutonium-238 (Pu-238) as a fuel source.—Prabhat Ranjan Mishra, Interesting Engineering, 26 Sep. 2025 Many long-term spacecraft, such as the Mars rovers Curiosity and Perseverance, use radioisotope thermoelectric generators (RTGs) to provide power.—Keith Cooper, Space.com, 24 Sep. 2025 See All Example Sentences for radioisotope
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