According to National Geographic, the primary reason Pluto was demoted from planet to dwarf planet status is its size relative to its satellite. All the other planets with moons ar...
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 has five known moons: Charon (the largest, with a diameter just over half ...
The IAU has not formalized a definition for binary dwarf planets, and Charon is
...... because the two cameras on ...
Jan 5, 2012 ... This article was originally written in 2008, but we created a cool video to go along
with it yesterday Let's find out why Pluto is no longer ...
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
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 ...
This group decided that Pluto was not really a planet because of its size and
location in space. ..... Large debris could be satellites that are no longer working.
Apr 22, 2015 ... Here's why Pluto is no longer considered a planet. (Photo : NASA/Johns Hopkins
University Applied Physics Laboratory/Southwest Research ...
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."