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The International Astronomical Union (IAU) is the body that makes such determinations. They voted to demote Pluto, and rightly so. Pluto is smaller than our moon. Charon, Pluto's moon, is nearly as big as it is, and Eris is bigger.
There are eight planets, and that is good enough, and it is a useful definition for solar systems beyond our own.
What else can I help you with?
What planets have been visited by machines?
All of the planets in the Solar System have been visited by machines except for the planet Pluto. There was a machine that was launched in 2004 for a flyby to Pluto in 2014.
What planet is farthest to the moon?
First of all why do you say YOUR solar system?? The planet is neptune and it has 13 moons which are: Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Triton, Nereid, Halimede, Sao, Laomedeia, Psamathe, and Neso.
What actors and actresses appeared in Pluto 101 - 2004?
The cast of Pluto 101 - 2004 includes: Andreas Deja as himself Leonard Maltin as himself
What are the release dates for The Sins of Pluto Patterson - 2004?
The Sins of Pluto Patterson - 2004 was released on: USA: April 2004 (WorldFest Houston) USA: 9 October 2006 (Griffon International Film Festival)
What are the release dates for Planet of Doom - 2004?
Planet of Doom - 2004 was released on: USA: September 2004
What date was Pluto not a planet?
The short answer is that the decision was ultimately made by the International Astronomical Union, or IAU. The longer answer is that nobody actually ever decided Pluto wasn't a planet. You see, before August 24th, 2006, there was no official definition of what is and is not a planet. As more differences were noted between Pluto and the other eight planets in our solar system, the need for an official definition became more pressing. Eventually the IAU met and formulated a definition upon which they could all agree. This definition excluded "planets" with characteristics like Pluto has, thus changing its classification from planet to dwarf planet.
What are the ratings and certificates for Planet Voice - 2004?
Planet Voice - 2004 is rated/received certificates of: Denmark:A
What are the ratings and certificates for Planet Cook - 2004?
Planet Cook - 2004 is rated/received certificates of: Australia:G
When was Planet Simpson created?
Planet Simpson was created in 2004.
When was Wrong Planet created?
Wrong Planet was created in 2004.
What actors and actresses appeared in Warriors of the Planet - 2004?
The cast of Warriors of the Planet - 2004 includes: Smorgas as Themselves
What actors and actresses appeared in Planet Kamagurka - 2004?
The cast of Planet Kamagurka - 2004 includes: Kamagurka as himself
