Pluto should be defined as a "Planet" sign now

On August 24, 2006, the International Astronomical Union (IAU) redefined the term "Planet" and in doing so caused Pluto to no longer be a "Planet".

Specifically, the IAU passed RESOLUTIONS 5A and 6A:

RESOLUTION 5A states:

"The IAU therefore resolves that 'planets' and other bodies in our Solar System be defined into three distinct categories in the following way:

(1) A 'planet'1 is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.

(2) A 'dwarf planet' is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape2 , (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.

(3) All other objects3 except satellites orbiting the Sun shall be referred to collectively as 'Small Solar-System Bodies'."

RESOLUTION 6A states:

"Pluto is a 'dwarf planet' by the above definition and is recognized as the prototype of a new category of trans-Neptunian objects.1"

According to the resolutions, Pluto is now a dwarf planet.

Please sign the Petition if you believe the IAU should reconsider the definition of "Planet" to include Pluto as a "Planet".

If would like more information about the IAU and its decisions, please visit: http://www.iau.org/






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Judy CamposBy:
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http://www.iau.org/

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