The Bruce Murray Space Image Library
Plutonium-238 Fuel Pellet
Filed under Plutonium-238
A ceramic fuel pellet of Plutonium-238 oxide glows orange from its radioactive decay. These pellets are used inside Radioisotope Thermoelectric Generators (RTGs) to provide heat that is converted into electricity on spacecraft.
Department of Energy
This image is in the public domain.
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