Re: ambiguity-free planetary classification


"Volker Hetzer" <firstname.lastname@xxxxxxxx> wrote in message
news:EOOdneJqNu7GCW3ZRVnyrQ@xxxxxxxxxxxxxxx
GatherNoMoss wrote:
Blurrt wrote:
An ambiguity-free planetary classification method is put forward here:

http://rogersplanetaryclassification.bigblog.com.au/data/2/11182/file/rogersplanetaryclassificationwebpage4856320060826163909.htm

Nathan.

" A Planet is a Celestial body that (a) has sufficient mass for its
self-gravity to overcome rigid body forces so that it assumes a
hydrostatic equilibrium (nearly round) shape"

Seems a perfectly resonable requirement to me.

People....this Pluto recatagorizing is just a sign we are becoming
more sophisticated.

The Aliens were laughing their asses off when they found out we were
calling Pluto a "Planet".

This has probably been asked before, but what criteria does pluto fail?
I couldn't make anything of the press releases so far.


They've added the requirement that a planet should have cleared the
neighborhood of any debris - but others have noted that this definition
excludes Jupiter and Earth from Planet status. Jupiter has its trojan
asteroids and Earth has a hoard of Apollo and Aten Asteroids.
Also, a celestial body, by this definition, cannot be called a planet on its
own merits.
The definition in the link above solves all the problems by first assigning
planetary status to a body then assigning a classification. There are still
8 primary planets, but a host of satellite and associate planets.

Nathan.


Nathan


.

Relevant Pages

  • Re: "Pluto Now Called a Plutoid"
    ... Look again at the phrase used "(nearly round) shape". ... a planet spinning fast enough will be triaxial. ... A star is a celestial body that sustains, has sustained, or is capable of ...
    (rec.arts.sf.science)
  • Planet Definition
    ... A planet is a celestial body that is by far the largest object in ... energy by any nuclear fusion mechanism. ... I like Pluto because when I ... was young it was the most distant planet from the sun and now Neptune ...
    (sci.space.policy)
  • Definition of a Planet
    ... A planet is a celestial body that is by far the largest object in ... energy by any nuclear fusion mechanism. ... I like Pluto because when I ... was young it was the most distant planet from the sun and now Neptune ...
    (sci.astro)
  • Re: Planet Definition
    ... :A planet is a celestial body that is by far the largest object in ... :lie close to the plane of the elliptic. ... :was young it was the most distant planet from the sun and now Neptune ... So if evidence came forward that, say, Earth was a 'wanderer' it would ...
    (sci.space.policy)
  • Re: "Pluto Now Called a Plutoid"
    ... clear if it qualifies as a planet. ... consider a solar system with a 6 solar-mass star orbited by a 25 ... That is an actual potential ambiguity, at the moment we don't know of any such bodies if we find one then we will have to decide. ... A star is a celestial body that sustains, has sustained, or is capable of ...
    (rec.arts.sf.science)
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