No, we’re not talking about Pluto the dog, whose name was changed by the Disney folks from Rover to Pluto shortly after Clyde Tombaugh discovered the planet in 1930.
The planet Pluto’s tail consists of ionized particles of nitrogen being blown off its surface by solar winds. They were detected by New Horizons Solar Wind Around Pluto (SWAP) instrument as the spacecraft sped away from the planet.
