Pluto does not meet all three criteria that now define a planet. A planet must orbit around the Sun, have sufficient mass to maintain a nearly round shape, and it must have cleared the neighborhood around its orbit.
Pluto has not cleared the neighboorhood around its orbit. It has been reclassified as a "dwarf planet".
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper
belt, a ring of ... The IAU has not formalized a definition for binary dwarf planets,
and Charon is officially classifi...
The truth is, nothing about Pluto changed, but the definition of a planet did. Once
these changes became official, Pluto no longer fit the definition of a planet.
Jul 13, 2015 ... In 2006, Pluto was demoted from planet status. Why was it removed from the
Nov 27, 2009 ... Let's find out why Pluto is no longer considered a planet. Pluto was first
discovered in 1930 by Clyde W. Tombaugh at the Lowell Observatory in ...
The International Astronomical Union (IAU) downgraded the status of Pluto to that
of a dwarf planet because it did not meet the three criteria the IAU uses to ...
Pluto used to be known as the smallest planet in our solar system, and the
furthest planet from the sun. Pluto was discovered in 1930 by Clyde Tombaugh, ...
Pluto is a dwarf planet in our solar system. ... But Pluto does not orbit in a circle.
The orbit of Pluto ..... Large debris could be satellites that are no longer working.
Aug 24, 2006 ... Pluto is no longer a planet, according to a new official definition. Instead the icy
sphere will be considered one of more than 40 "dwarf planets."
Aug 24, 2006 ... Pluto, shown as the outermost ring in both illustrations, has the most irregular
orbit of all of the objects previously considered planets.