its not!
because neptune is not a star and Pluto is not a moon of neptune
Neptune was discovered before Pluto.
Neptune and Pluto are not the same discovery at all.
Neptune is the planet closest to Pluto
Pluton est à la droite de Neptune (Pluto is right TO Neptune), or Pluton est près de Neptune (Pluto is right next to Neptune)
I do not understand your question, but I can tell you that Neptune has 13 moons and Pluto has 3.
Pluto
2543166000
The closest planet to Pluto is Neptune, the closest object would be Chiron which is Pluto's "moon", although it is little more than a captured asteroid.
The planet with an orbit that intersects the orbit of the dwarf planet Pluto is Neptune. Neptune, the eighth and farthest known planet from the Sun in the Solar System, has an orbit that crosses Pluto's orbit due to its elliptical path around the Sun. This orbital relationship between Neptune and Pluto is one of the factors that led to Pluto's reclassification as a dwarf planet in 2006 by the International Astronomical Union.
Neptune is the planet that typically lies between Pluto and Uranus. However, during some parts of it's orbit, Pluto will be closer to the sun than Neptune is (i.e. Neptune is no longer between Uranus and Pluto; instead, Pluto is between Uranus and Neptune).In fact, as of February 11th, 1999, Pluto passed Neptune, thereby making Neptune the furthest planet from the Sun. Neptune will continue to be the further than Pluto until April 5th, 2231.
neptuneNeptune is the closest to Pluto. Uranus is the second closest planet to Pluto. Saturn is the third closest planet to Pluto. Jupiter is the forth closest planet to Pluto. Mars is the fifth closest planet to Pluto. Earth is the sixth closest planet to Pluto. Venus is the seventh closest planet to Pluto. Mercury is the most furthest away from Pluto. The Sun and the moon are not considered as planets. The planet Pluto is also not considered as a planet.