In the year 2006.
Pluto was demoted because it did not have an orbit of its own, but shared its orbit with other Kuiper belt objects (KBOs).
(The link below should help answer your question better)
Pluto became a dwarf planet on august 24, 2006.
It was reclassified on August 24, 2006. It was reclassified by the International Astronomical Union.
This is Pluto.
It was reclassified as a dwarf planet.
it was to small so they reclassified it as a dwarf planet
No known planet is smaller than Mercury since Pluto was reclassified as a Dwarf Planet.
Pluto is the planet that scientist are saying is not a planet. Scientists are not saying any particular planet is not a planet. Simply that Pluto has been reclassified as a dwarf planet.
Pluto
Pluto, it was reclassified as a dwarf planet
This is Pluto.
Pluto, it is now a dwarf planet or planetoid.
Pluto was reclassified as a dwarf planet in 2006, after being known as a major planet for 76 years.
No, it was only reclassified as a dwarf planet
Pluto was originally called a planet, it is now reclassified as a dwarf planet.
Pluto is a rocky world. Pluto is now reclassified as a dwarf planet.
Pluto was reclassified as a dwarf planet in 2006. Pluto was regarded as a planet from its discovery in 1930 until 2006. As Pluto only meets two of the three requirements for the planet classification, it is not considered a planet anymore.
It was reclassified as a dwarf planet.
A concensus of astronomers at a convention in Prague of the International Astronomical Union reclassified Pluto as a minor or dwarf planet, in 2006.
Pluto never changed to a star. In 2006 it was reclassified as a dwarf planet.