Pluto is shown as a planet on the Pioneer plaque, an inscription on the space probes "Pioneer 10" and "Pioneer 11", launched in the early 1970s. The plaque, intended to give information about the origin of the probes to any alien civilization that might in the future encounter the vehicles, includes a diagram of our solar system, showing nine planets. Similarly, an analog image contained within the Voyager Golden Record included on the probes "Voyager 1" and "Voyager 2" (also launched in the 1970s) includes data regarding Pluto and again shows it as the ninth planet. The Disney character Pluto, introduced in 1930, was also named in honour of the planet. In 1941, Glenn T. Seaborg named the newly created element plutonium in Pluto's honour, in keeping with the tradition of naming elements after newly discovered planets (uranium after Uranus and neptunium after Neptune, although this tradition is also used for some non-planets: cerium is named after Ceres and palladium after Pallas).

ಭೌತಿಕ ಗುಣಲಕ್ಷಣಗಳು
Commemoration as a planet
ನೆಪ್ಚೂನ್-ತಪ್ಪಿಸುವ ಕಕ್ಷೆ
Demise of Planet X