Because it crosses paths with Neptune.
It is the 2nd largest. Ceres is the smallest Dwarf planet. Eris is the largest.
A Dwarf Planet
Pluto's orbital is elliptical. Its farthest planet from sun when it lies on two elliptical end. On the other hand Neptune's orbital is circular and become larger then Pluto's orbit when Pluto come in the middle of two elliptical end. For this reason Pluto is not always farthest planet from sun.
Well for pluto to be considored a planet it would need to… …straighten out its orbit because it intersects with Neptunes orbit …Become bigger …Be closer to the sun …Dominate its moon
Pluto has not become a black hole. Pluto is a dwarf planet located in our solar system, while black holes are objects formed from the remnants of massive stars that have collapsed under their own gravity.
Pluto
It is the 2nd largest. Ceres is the smallest Dwarf planet. Eris is the largest.
A Dwarf Planet
In order to be considered a planet, Pluto would have to clear its orbital path of debris. Pluto is not large enough to do this, so it was reclassified as a dwarf planet.
Pluto, it is now a dwarf planet or planetoid.
Since Pluto is no longer considered a planet, mercury has become the smallest planet.
Pluto's orbital is elliptical. Its farthest planet from sun when it lies on two elliptical end. On the other hand Neptune's orbital is circular and become larger then Pluto's orbit when Pluto come in the middle of two elliptical end. For this reason Pluto is not always farthest planet from sun.
Pluto may become a major planet again in a few million years, if it clears it's orbit of asteroids and other debris.
Pluto is not a planet its a dwarf planet
The IAU arrived at a new definition for "planet" which left Pluto out in the cold. It is now designated as a "Dwarf Planet". also it was called a planet when is was larger but now it has become smaller scientists no longer class it as a planet
Pluto is a rocky world. Pluto is now reclassified as a dwarf planet.
Pluto is a dwarf planet