Is pluto fired from its job of planetism?

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Anonymous

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This is really confusing me.<br />To find out details I logged on to www.NASA.gov but was left unanswered. Are they able to decide or not?<br /> I have two links to its pages here..<br /> http://science.nasa.gov/newhome/headlines/ast17feb99_1.htm <br /><br />http://apod.gsfc.nasa.gov/apod/ap960212.html <br /><br />http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/pluto.html <br /><br />http://www.nasa.gov/centers/ames/events/2006/lecture-pluto.html <br />CAN ANYONE REPLY TO ME? <div class="Discussion_UserSignature"> <strong><font size="2"><p align="center"><br /><img id="a9529085-d63d-481e-9277-832ea5d58917" src="http://sitelife.space.com/ver1.0/Content/images/store/9/2/a9529085-d63d-481e-9277-832ea5d58917.Large.gif" alt="blog post photo" /><br /><font color="#339966">Oops! this is my alien friend.</font></p><p align="center"><font color="#ff6600">╬→Ť╠╣є ’ M€ ’<br />╬→ Ðôŵņ2Ëãřŧĥ ๑<br />╬→ ЙДm€ :Varsha<br /></font></p></font></strong> </div>
 
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Anonymous

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Comeon, check this out! <div class="Discussion_UserSignature"> <strong><font size="2"><p align="center"><br /><img id="a9529085-d63d-481e-9277-832ea5d58917" src="http://sitelife.space.com/ver1.0/Content/images/store/9/2/a9529085-d63d-481e-9277-832ea5d58917.Large.gif" alt="blog post photo" /><br /><font color="#339966">Oops! this is my alien friend.</font></p><p align="center"><font color="#ff6600">╬→Ť╠╣є ’ M€ ’<br />╬→ Ðôŵņ2Ëãřŧĥ ๑<br />╬→ ЙДm€ :Varsha<br /></font></p></font></strong> </div>
 
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Anonymous

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Pluto: Planet or Not?<br /><br />Review the evidence below and vote.<br /><br />Why Pluto should be considered a planet:<br /><br />1.It has enough gravity to pull itself into a sphere. <br />2.It has its own moon. <br />3.It’s larger than Quaoar and Sedna and the other objects. <br />4.It has an atmosphere. <br />5.It’s been called a planet since it was discovered in 1930. <br /><br />Why Pluto shouldn’t be considered a planet:<br /><br />1.It has a much more eccentric and tilted orbit than any of the other planets. <br />2.It’s a lot like the comets and other Kuiper Belt objects found at the edge of our solar system. <br />3.It’s smaller than four of the planetary moons in our solar system. <br />4.It has very little in common with Neptune and the other outer planets. <br />5.It is most similar to Quaoar and Sedna, the latest Kuiper Belt objects to be discovered. <br /><br /> --YES, Pluto's a planet<br /> --NO, Pluto's not a planet<br /><br />Send your replies!<br /> <br /> <div class="Discussion_UserSignature"> <strong><font size="2"><p align="center"><br /><img id="a9529085-d63d-481e-9277-832ea5d58917" src="http://sitelife.space.com/ver1.0/Content/images/store/9/2/a9529085-d63d-481e-9277-832ea5d58917.Large.gif" alt="blog post photo" /><br /><font color="#339966">Oops! this is my alien friend.</font></p><p align="center"><font color="#ff6600">╬→Ť╠╣є ’ M€ ’<br />╬→ Ðôŵņ2Ëãřŧĥ ๑<br />╬→ ЙДm€ :Varsha<br /></font></p></font></strong> </div>
 
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SpeedFreek

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The top 3 links in your 1st post are years out of date!<br /><br />This year, the IAU ruled that Pluto is NOT a planet.<br /><br /> SEE HERE for more information. <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>
 
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MeteorWayne

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This subject has been discussed with over 1000 posts in half a dozen older threads.<br />Some corrections:<br /><br />"3.It’s larger than Quaoar and Sedna and the other objects." <br /> It is also smaller than Eris (formerly Xena)<br /><br />"5.It’s been called a planet since it was discovered in 1930."<br /><br />Back when asteroids were first being discovered in the early 1900's, a dozen or so were also called planets before it was realized that these were tiny objects, and there were hundreds of them, (now hundreds of thousands). At that time the number of planets went back to 8, until Pluto came along. When it was discovered it was assumed it was a large object, so it was called a planet. Over the years, with more observations, it was realized it was much smaller.<br /><br />"5.It is most similar to Quaoar and Sedna, the latest Kuiper Belt objects to be discovered. " <br />This is years out of date as thousands of Kuiper Belt objects have been discovered since then.<br /><br />You might also add to reasons for it not being a planet that it is one of dozens of objects in a class called plutinos which orbit the sun in similar orbits. These make exactly 2 revolutions to 3 for Neptune. These gravitationally locked orbits are called resonant orbits.<br /><br />As those who've been around know, I'm in the Pluto is not a planet crowd. There are many good arguments on both sides, it is not a simple issue.<br /><br />As of the current time the "official" IAU definition calls Pluto, Eris, and Ceres "dwarf planets"<br /><br />I'm sure the issue will be addressed again at the next IAU general assembly in 2009, when a more refined definition, considering all we will have learned by then will be hotly debated and decided. And Carnac predicts that a lot of people still won't be satisfied, no matter what is decided <img src="/images/icons/smile.gif" /><br /><br />For my take on things I refer you to http://uplink.space.com/showthreaded.php?Cat=&Board=sciastro&Number=57</safety_wrapper <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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mako71

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<font color="yellow">MeteorWayne (Pluto being planet or not): There are many good arguments on both sides, it is not a simple issue.</font><br /><br />I think that the strongest reason for Pluto not being planet according to astronomers is that the different models under name "planet formation" are getting their correct meaning (i.e. simplifying the classifications). That is, when studying planet formation, you normally examine planets from Mercury to Neptune and explicitely leave Pluto out, because it is not following the same mechanisms (circular orbits and such). In those models it is regularly explicitely moved to group "other objects in Solar system", and now it goes to that group implicitely (no need to mention in all scientific papers). <div class="Discussion_UserSignature"> <p> </p><p>________________ </p><p>reaaliaika.net </p> </div>
 
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