Pluto is no longer considered a planet (however it is called a dwarf planet) because it failed to meet the International Astronomical Union's definition of a planet:
must orbit the sun (check)
nearly round in shape (also, check)
has cleared its orbit area of other planets (here's where Pluto fails, as Saturn crosses Pluto's orbit every so many years)
because pluto is not big enough
The planet that was an outer planet, but was more like an inner planet was Pluto because of its size. The planet Pluto is no longer considered to be a planet.
August 24, 2006 is the date when Pluto was consider no more a planet.
In 2006 Pluto was degraded to the status of dwarf planet(there is another dwarf planet, Eris, that is more massive than Pluto).
Pluto was founded by ancient Greek astronomers thousands of years ago. So I'll go with Pluto the planet, despite it now being a dwarf planet.
Pluto is not considered a planet any more.
a dwarf planet
Mercury, which is over twenty times the mass of (minor planet) Pluto.
Pluto, it is now a dwarf planet or planetoid.
It came from one of the gods.
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.
If by this, you mean the planet next closest to the sun, the answer is Neptune! Of course, Pluto isn't a planet any more. Hope this helps!