Pluto - ț̢
The ninth planet in order from the sun. It is one of the five outer planets of the solar system. Its only natural satellite is Charon.
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Plutonium - ț̢
Plutonium. A naturally radioactive element of the actinide metals series. It has the atomic symbol Pu, atomic number 94, and atomic weight 242. Plutonium is used as a nuclear fuel, to produce radioisotopes for research, in radionuclide batteries for pacemakers, and as the agent of fission in nuclear weapons.