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18 years 2 months ago #17639 by thebobgy
Pluto not a planet?
After reading MRB about Pluto's status as a planet I have a question; if Pluto, as a planet, can not be defined, how then, does the IAU define Earth as a planet?
thebobgy

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18 years 2 months ago #19005 by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by thebobgy</i>
<br />Pluto not a planet? After reading MRB about Pluto's status as a planet I have a question; if Pluto, as a planet, can not be defined, how then, does the IAU define Earth as a planet?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">The IAU was persuaded in a hasty compromise session that the eight classical planets met the proposed new definition: orbits the Sun, enough gravity to be in hydrostatic equilibrium (round shape), and "cleared out its zone".

It's that last part that all the fuss is now about. -|Tom|-

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18 years 2 months ago #19059 by thebobgy
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by tvanflandern</i>
<br /><blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by thebobgy</i>
<br />Pluto not a planet? After reading MRB about Pluto's status as a planet I have a question; if Pluto, as a planet, can not be defined, how then, does the IAU define Earth as a planet?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">The IAU was persuaded in a hasty compromise session that the eight classical planets met the proposed new definition: orbits the Sun, enough gravity to be in hydrostatic equilibrium (round shape), and "cleared out its zone".It's that last part that all the fuss is now about. -|Tom|-<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">That's my point Tom; the third criteria "(c)". As follows, (a) is in orbit, (b) sufficient mass and (c) "cleared its zone". If what you say in the the bulletin about two bodies in the same orbit can not collide is true, and Earth DID NOT clear its own zone then, by IAUs definition, Earth is no longer a planet. I may have a "left handed" <i>note,("left handed" is not intended as a slur)</i> argument but that's the way I see it.
thebobgy

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18 years 2 months ago #17649 by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by thebobgy</i>
<br />If what you say in the the bulletin about two bodies in the same orbit can not collide is true, and Earth DID NOT clear its own zone then, by IAUs definition, Earth is no longer a planet.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Right. That was part of the point -- nothing qualifies as a planet by strict interpretation of the new rules. Even Jupiter has lots of good-size Trojan asteroids in its orbit. -|Tom|-

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18 years 2 months ago #17660 by thebobgy
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by tvanflandern</i>
<br />

-- nothing qualifies as a planet by strict interpretation of the new rules. Even Jupiter has lots of good-size Trojan asteroids in its orbit. -|Tom|-<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">True, but, would you agree that now would be the time for MM to jump to the front of the line and bring that fact into focus to the general public.
thebobgy

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18 years 2 months ago #17661 by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by thebobgy</i>
<br />would you agree that now would be the time for MM to jump to the front of the line and bring that fact into focus to the general public.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">The general public has its own non-technical reasons for wanting to preserve the status quo for Pluto. I've sent this Meta Research material to the person heading the recall petition sent to the IAU Executive Committee, which is the only body that can act in an official capacity. Beyond that, I do find this is a popular topic for radio and internet talk shows, where I also discuss it for the public.

Is there something else you think might be appropriate? I'm not sure that nomenclature issues are the best place to expend our energy, but I do note that they always get the most public attention. -|Tom|-

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