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Old 11-July-2003, 06:33 AM
CorugatedBoxMan CorugatedBoxMan is offline
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Default Pluto, a planet or not?

I was just curious who here at the BABB thinks that Pluto should not be clasified as a planet. I would do a poll, but I couldn't figure it out last time, so screw it, lol.
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Old 11-July-2003, 07:42 AM
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Well, it's got a moon, no?
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Old 11-July-2003, 07:50 AM
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So does asteroid Ida...

Well, I think we already had too many threads about this subject, the state of Pluto...
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Old 11-July-2003, 08:30 AM
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the most recent one i've seen
http://www.badastronomy.com/phpBB/viewtopic.php?t=4016

and as for me? i have to sit on the fence here :P
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Old 11-July-2003, 05:13 PM
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well actually as soon as I posted that I thought to myself, this was probably done already. Oh well. . .
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Old 11-July-2003, 05:29 PM
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In my opinion (as a scientist), I belive that Pluto isn't a planet exactly. But I think that it really doesn't matter, after all its in our solar system, has a recognizable name, and almost every one considers it to be a planet. So frankly it really doesn't matter what you say, all most everyone will still consider it a planet. hmm...maybe I said to much on this issue....oh well
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Old 11-July-2003, 08:04 PM
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Pluto is a dual-citizen. For now it is considered a planet, but it is also the largest of the KBOs, or TNOs (Kuiper Belt Objects, and Trans-Neptunian Objects, respectively).

I think it will be de-classified as a planet in the near future and just be the first of the Pluto-Class KBOs.
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Old 11-July-2003, 08:21 PM
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Planet or not, Pluto is a very unique object. It has an atmosphere. What is a gravitationally small object that far out from the sun doing with an atmosphere? It has polar caps. The Earth and Mars are the only other solar system objects with confirmed polar caps.
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Old 11-July-2003, 09:09 PM
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The question is, are we basing a "Planet" off of visual characteristics or origin / formation.
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Old 11-July-2003, 09:21 PM
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Welcome to the BABB, Bobolink! You'll enjoy it here, feel free to browse the different subjects scattered about.

Nitpick: "very unique" doesn't exist. Unique is a solitary term, so I've heard. Ah well.

As far as an atmosphere...it has a very thin one, if indeed it does have one. I wouldn't say it has polar ice caps, because the entire surface is frozen.

I think Mercury has permanent ice caps, hidden by shadows to protect from the heat of the Sun.
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Old 11-July-2003, 10:20 PM
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OK Vermonter. You can call me the Bad Grammarian

However, Pluto does have a distinct north polar cap as imaged by the ESA's Faint Object Camera on the Hubble Space Telescope. A reference is
http://nssdc.gsfc.nasa.gov/photo_gal...ery-pluto.html read the caption for the middle photo.
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Old 12-July-2003, 12:23 AM
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Cool, I didn't know that. That's pretty fascinating!
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Old 13-July-2003, 07:47 PM
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Default Re: Pluto, a planet or not?

Quote:
Originally Posted by CorugatedBoxMan
I was just curious who here at the BABB thinks that Pluto should not be clasified as a planet. I would do a poll, but I couldn't figure it out last time
colt's poll, that man on the moon linked to, turned out very nearly fifty-fifty, though recent voting there may have turned it either way.
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Old 13-July-2003, 09:15 PM
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I'll go with the Transneptunian Object/Kuiper Belt Object scientists. Pluto does not have the same orbital plane and changes position (from 8th planet to ninth planet and vice versa). I think that it is the largest of the Transneptunian Objects and/or Kuiper Belt Objects and that is quite something in itself.

Of course, it will take awhile for the dust to settle. Whatever it is called, will not affect its nature. Whatever it is will not change. What's in a name? Then again, I think that for scientific study, it should be a part of the more recent categories.

For the general public, it is just fine to call it a planet (for now). Whatever we call Pluto, it will remain whatever it is. I prefer scientific judgments over sentimental wishful thinking.

I do not think that this will ever be finally decided. There will always be somebody out there who will steadfastly maintain it is a planet. So there! Take that! And that! And that!

ljbrs :roll:
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Old 13-July-2003, 09:26 PM
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Pluto is a planet because the International Astronomical Union defines it as such. Now, the real question is: what is a planet? The word is undefined by the IAU.
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Old 13-July-2003, 09:43 PM
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Quote:
Pluto is a planet because the International Astronomical Union defines it as such. Now, the real question is: what is a planet? The word is undefined by the IAU.
Some while back, several years ago, as my memory tells me, Brian Marsden of the IAU argued against Pluto's planet status. However, I believe he later went over (was persuaded to go?) to the other (planet)side when public opinion carried the day. The last time I checked (again sometime ago) I noticed that the IAU gave Pluto a dual status, unless that, too has changed back to a planetary status.

However, it all has been very, very interesting from a spectator's point of view.

ljbrs
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Old 13-July-2003, 11:39 PM
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Quote:
Originally Posted by ljbrs
The last time I checked (again sometime ago) I noticed that the IAU gave Pluto a dual status, unless that, too has changed back to a planetary status.
I think the last time you checked was March, in this post. As you quote there, the IAU has not given Pluto a dual status. They still designate it a planet, only.
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Old 14-July-2003, 02:47 AM
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As far as I know, there's no convention that prevents it from being both a planet AND a KBO...
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Old 14-July-2003, 02:53 AM
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Come to think of it, I haven't seen a convention that prevents it from being a Failed Gas Giant either.
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Old 18-July-2003, 01:55 AM
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My handle says it all =;
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Old 18-July-2003, 02:08 AM
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Wasn't Pluto shown to be warming recently?
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Old 18-July-2003, 04:15 AM
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Quote:
Originally Posted by The Bad Astronomer
Pluto is a planet because the International Astronomical Union defines it as such. Now, the real question is: what is a planet? The word is undefined by the IAU.

I agree. The discussion is moot. It is a planet. The next discussion should be: "Can KBO be accepted as planets?"
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Old 18-July-2003, 04:45 AM
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Quote:
Originally Posted by freddo
Wasn't Pluto shown to be warming recently?
Yes. Which is a fortunate thing, since the goal is to get New Horizons to Pluto before the atmosphere freezes out.
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Old 19-July-2003, 03:22 AM
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Quote:
Originally Posted by AK
Quote:
Originally Posted by freddo
Wasn't Pluto shown to be warming recently?
Yes. Which is a fortunate thing, since the goal is to get New Horizons to Pluto before the atmosphere freezes out.


That is going to be a long trip I would say. To get all the way to Pluto, from Earth 8-[
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Old 19-July-2003, 04:12 AM
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Quote:
Originally Posted by Pluto is a planet
Quote:
Originally Posted by AK
Quote:
Originally Posted by freddo
Wasn't Pluto shown to be warming recently?
Yes. Which is a fortunate thing, since the goal is to get New Horizons to Pluto before the atmosphere freezes out.


That is going to be a long trip I would say. To get all the way to Pluto, from Earth 8-[
Well, it's going to take at least 9 years, and that's with a gravity assist from Jupiter.
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Old 22-July-2003, 08:36 PM
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what is pluto? its a big rock.....thats what it is! :P
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Old 23-July-2003, 01:27 AM
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Quote:
Originally Posted by Vega115
what is pluto? its a big rock.....thats what it is! :P
Would that make gas giants big *arts?
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Old 23-July-2003, 01:33 AM
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I see them all as resources to be exploited!

*Runs*
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Old 23-July-2003, 01:41 AM
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Quote:
Originally Posted by The Supreme Canuck
I see them all as resources to be exploited!

*Runs*
Never run from profit.

*Runs*
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Old 23-July-2003, 01:43 AM
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*Stops*

*Turns*

Hypocrite!

*Turns Back*

*Runs Faster*

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