Its validity as a planet has recently been disputed.
What are your views?
What are your views?
Is Pluto a planet?
LOL...
For once im gonna be rather conservative about something:
I think its a planet...
Seen as its been one for the past many years why should it stop being one now, just because they found some bigger stuff further out?
Maybe it will turn out that the sun is really a part of the earth next
For once im gonna be rather conservative about something:
I think its a planet...
Seen as its been one for the past many years why should it stop being one now, just because they found some bigger stuff further out?
Maybe it will turn out that the sun is really a part of the earth next
At U.C. Davis my Geology professor has stated that Pluto is indeed a planet, but just not one of the outer planets that share anything alike as the other four and that it is in its own category.
| jds10912 wrote: |
| Its validity as a planet has recently been disputed.
What are your views? |
Yeah, I mean, one can't be so naive to believe that nothing bigger than Pluto exists beyond Pluto, and we've learned it as a planet for so many years - why stop now?
I think it's a planet. If it was named a planet before why not now? lol does that make any sense?
Where I live (lake charels, louisiana), our local news reported today that Pluto and three other planets have been accepted as official planets of the Milkyway.
God bless,
Pampoon
God bless,
Pampoon
i think that pluto is a planet. why the dispute i cannot say but wikipedia says that it has an 'eccentric orbit'.
Quote from wikipedia
Quote from wikipedia
| Quote: |
| The planet Pluto was originally discovered in 1930 in the course of a search for a body sufficiently massive to account for supposed anomalies in the orbits of Uranus and Neptune. Once it was found, its faintness and failure to show a visible disk cast doubt on the idea that it could be Percival Lowell's Planet X. Lowell had made a prediction of Pluto's position in 1915 which had turned out to be fairly close to its actual position at that time; however Ernest W. Brown concluded almost immediately that this was a coincidence, and this view is retained today. Lowell had also made earlier, different predictions of Planet X's position beginning in 1902.[10]
In the following decades estimates of the Plutonian mass and diameter were the subject of debate as telescopes and imaging systems improved. The consensus steadily favored smaller masses and diameters as time passed. Indeed, one observer waggishly pointed out that if the trend were extrapolated, the planet seemed to be in danger of vanishing altogether, a remark which proved possibly prophetic in light of later debates over Pluto's status as a "planet". In an attempt to reconcile Pluto's small apparent size with its identification as "Planet X", the theory of specular reflection was proposed. This held that observers were measuring only the diameter of a bright spot on the highly reflective surface of a much larger planet which could thereby be massive without having an exceptionally high density. The uncertainty was conclusively resolved by the discovery of Pluto's satellite Charon in 1978. This made it possible to determine the combined mass of the Pluto-Charon system which turned out to be lower even than that anticipated by skeptics of the specular reflection theory, which was then rendered completely untenable. The accepted figure for Pluto's diameter today makes it considerably smaller than the Moon, with only a fraction of the Moon's mass on account of its being largely composed of ice. More recently, measurements of the path of Voyager 2 have shown that Neptune has a greater mass than previously believed and that when the updated mass is taken into account there is no anomalous movement of Uranus or Neptune. Thus Pluto's discovery and Lowell's 1915 prediction were largely coincidental as Pluto actually has no role in what were believed to be anomalies in Neptune and Uranus' motion. Pluto's discovery was mostly due to the diligence of Tombaugh's search. |
Its totally a planet ... I don't care if people say that its size isn't that good ...
Apparently just about any old thing can be a planet thanks to the International Astronomical Union's recent decree:
http://en.wikipedia.org/wiki/Definition_of_planet
“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, and (b) is in orbit around a star, and is neither a star nor a satellite of a planet.”
Charon, Pluto's moon is now a planet! Pluto and Charon are a double planet system, because the barycentre (centre of mass) is in between the two planets. Nonsense. The Moon isn't a planet because the barycentre is within the Earth.
Ceres, an asteroid is now also a planet! When will this madness stop! Before long we'll have a whole load of dumb planets not pulling their weight. You can't compare Jupiter and Saturn to hopeless bits of small rock in the middle of nowhere. Mercury only has my blessing because it's proximal to the Sun otherwise I wouldn't care for it.
My personal definition is any body greater than 2000km in diameter, who's primary orbit is around the Sun.
http://en.wikipedia.org/wiki/Definition_of_planet
“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, and (b) is in orbit around a star, and is neither a star nor a satellite of a planet.”
Charon, Pluto's moon is now a planet! Pluto and Charon are a double planet system, because the barycentre (centre of mass) is in between the two planets. Nonsense. The Moon isn't a planet because the barycentre is within the Earth.
Ceres, an asteroid is now also a planet! When will this madness stop! Before long we'll have a whole load of dumb planets not pulling their weight. You can't compare Jupiter and Saturn to hopeless bits of small rock in the middle of nowhere. Mercury only has my blessing because it's proximal to the Sun otherwise I wouldn't care for it.
My personal definition is any body greater than 2000km in diameter, who's primary orbit is around the Sun.
So this would mean there are no planets anywhere else in the universe (considering there is only one sun!).
Pluto seems to be a planet. If Mercury was as far as Pluto, it would still be a planet. It could be an asteroid, but then I believe it would be accompanied by many others, just as in an asteroid belt.
However, hasn't it been proved now that something much bigger lied further? This would be a darn good explanation to the irregular orbit of Pluto, considering most other planets so far have a round orbit.
And in the end... does knowing wether Pluto is a planet or not truly matter?
Pluto seems to be a planet. If Mercury was as far as Pluto, it would still be a planet. It could be an asteroid, but then I believe it would be accompanied by many others, just as in an asteroid belt.
However, hasn't it been proved now that something much bigger lied further? This would be a darn good explanation to the irregular orbit of Pluto, considering most other planets so far have a round orbit.
And in the end... does knowing wether Pluto is a planet or not truly matter?
I was always told that Pluto was a planet, and will continue to say Pluto is a planet. Why change their minds now? 
No matter what any scientist says, people will always consider Pluto a planet simply for the reasons stated above: Why change your mind now? I don't really think that since we have found so may new, larger planetoids tha they will be accepted as planets in the future, simply because we don't want to have 900 planets.
If I were not to consder Pluto, it would be because of its mass and apparent similarity to so many things out there. But it was discovered first, so I consider it a planet.
Only a fraction of all planets orbit our sun. Do you mean a sun? That would make sense.
If I were not to consder Pluto, it would be because of its mass and apparent similarity to so many things out there. But it was discovered first, so I consider it a planet.
| UHF123 wrote: |
|
My personal definition is any body greater than 2000km in diameter, who's primary orbit is around the Sun. |
Only a fraction of all planets orbit our sun. Do you mean a sun? That would make sense.
I would personally consider it a planet since it's got it's own moon
| UHF123 wrote: |
|
My personal definition is any body greater than 2000km in diameter, who's primary orbit is around the Sun. |
Only a fraction of all planets orbit our sun. Do you mean a sun? That would make sense.[/quote]
Well, I was talking about our Planets but I suppose the IAU definition is meant to extend to any extra-solar planets too.
I think today's ruling about Pluto is ridiculous, why not just leave it as a Planet and enforce the non-planet definition on all the other bigger but further objects orbiting the Sun?
| Quote: |
| Seen as its been one for the past many years why should it stop being one now, just because they found some bigger stuff further out? |
Why argue here about that? It has been decided by the astronomical society that Pluto isn't a planet as it doesn't fit into their definition of a planet. There are certain anomalies that have to be dealt first. Then we will call it whatever it is, but at this time Pluto isn't a planet as stated by the astronomical society. This is their job.
| Quote: |
| I think it's a planet. If it was named a planet before why not now? lol does that make any sense? |
1. What you think is not relevant here in this topic (no offense).
2. It wasn't named a planet it was categorized as a planet.
3. It does make sense. Information was found that it doesn't fit into the categoty of a planet so it's out.
Reasons Why it isn't:
1.Pluto didn't form with the sun when all the gases made rocky planets and gas Giants, It span in to orbit with it (the sun).
2.It's not really the size of a regualar planet and some scientists consider it not a planet because of that. (Note: Pluto is smaller then earth's moon)
Reasons why it is:
1.It's in orbit with the sun and it has moons (like normal planets).
It belive it isn't.
I've just heard on the news that astronomers say it isn't too and it shall now be known as a dwarf planet.
I still miss pluto as a planet though
.
1.Pluto didn't form with the sun when all the gases made rocky planets and gas Giants, It span in to orbit with it (the sun).
2.It's not really the size of a regualar planet and some scientists consider it not a planet because of that. (Note: Pluto is smaller then earth's moon)
Reasons why it is:
1.It's in orbit with the sun and it has moons (like normal planets).
It belive it isn't.
I've just heard on the news that astronomers say it isn't too and it shall now be known as a dwarf planet.
I still miss pluto as a planet though
.Yeah we shoulda kept it for historical value... now they screwed up all the anagrams from remembering the planets..
Many Very Excited Marshians Jetted Somewhere Up Near Pluto
I mean where the hell are these marshians supposed to jet if theres no pluto? did these science nerds think of that!
Many Very Excited Marshians Jetted Somewhere Up Near Pluto
I mean where the hell are these marshians supposed to jet if theres no pluto? did these science nerds think of that!
Pluto has been officially "demoted" from planet status to dwarf planet status.
The only thing that i can call this entire rubbish is "wasting your brain and your time"
After all this years that we were taught that pluto is a planet and now suddenly because of the discovery of new object is pluto demoted to a dwarf planet.
This is to nuts for thinking.
I hope that a few of you think the same as i do.
After all this years that we were taught that pluto is a planet and now suddenly because of the discovery of new object is pluto demoted to a dwarf planet.
This is to nuts for thinking.
I hope that a few of you think the same as i do.
I think it's kind of stupid - we've all learned it as a planet, we have had no problems with it, why change it now? There's no difference... Except now the textbooks are wrong and have to all be changed.
For many years people did think that earth is a plane, for many years people did think that Earth is the center of the universe. Looking at some of your posts i am starting to realize why it was so hard to prove that what people are thinking is not always the truth.
In our mind it is , In real it isn't.
yes pluto is a planet
| Soulfire wrote: |
| Pluto has been officially "demoted" from planet status to dwarf planet status. |
That is true, and while it is sort of sentimental to say goodbye to it as a planet, it is sort of an advacement for science.
However one thing few people have talked about is the amount of money that will have to be spent in order to fix all the text books, etc. As an amateur economist I find that to be important.
Of course it is not any longer considered a planet and will now be known as a dwarf planet, which I've never heard of before.
I heard it on the radio, it must be true.
Are there eight planets actually now?
Does anyone know this for sure?
Has anyone ever been in outerspace?
I haven't.
I wouldn't want to, probably.
What if it is a hoax and we live in a bubble?
I heard it on the radio, it must be true.
Are there eight planets actually now?
Does anyone know this for sure?
Has anyone ever been in outerspace?
I haven't.
I wouldn't want to, probably.
What if it is a hoax and we live in a bubble?
| WeAlreadyHaveACult wrote: |
| Of course it is not any longer considered a planet and will now be known as a dwarf planet, which I've never heard of before.
Are there eight planets actually now? |
Yes there are 8 planets now and 4 dwarf planets, Pluto just got reclassified thats all.
I think it is somehow ridiculous, but with all these new discoveries it was time for a good definition of a "planet". But the definition still seems not realy clear to me:
What is considered as a "cleared neighborhood"???
But actually the fact that we thought Pluto is a planet for many years is NOT a good argument to keep thinking that. Although it is a pity to lose these nice sentences like Many Very Excited Marshians Jetted Somewhere Up Near Pluto.
| Quote: |
| A planet is a body that orbits the Sun, is large enough for its own gravity to make it round, and has "cleared the neighborhood" of smaller objects. |
What is considered as a "cleared neighborhood"???
But actually the fact that we thought Pluto is a planet for many years is NOT a good argument to keep thinking that. Although it is a pity to lose these nice sentences like Many Very Excited Marshians Jetted Somewhere Up Near Pluto.
| Cibes wrote: |
| ...
But actually the fact that we thought Pluto is a planet for many years is NOT a good argument to keep thinking that. Although it is a pity to lose these nice sentences like Many Very Excited Marshians Jetted Somewhere Up Near Pluto. |
Even that memory aid was a problem for that time that Pluto was closer to the sun than Uranus! Life is just hard, ya know?
| HoboPelican wrote: |
| Even that memory aid was a problem for that time that Pluto was closer to the sun than Uranus! Life is just hard, ya know? |
| dwcnps wrote: |
| Pluto didn't form with the sun when all the gases made rocky planets and gas Giants, It span in to orbit with it (the sun). |
| Cibes wrote: | ||||
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Yeah, I didn't know it until my nephew told me.lol.
From Wikipedia
| Quote: |
|
Near perihelion, Pluto gets closer to the Sun than Neptune; the most recent occurrence of this phenomenon lasted from February 7, 1979 through February 11, 1999. Mathematical calculations indicate that the previous occurrence lasted only fourteen years from July 11, 1735 to September 15, 1749. However, the same calculations indicate that Pluto was closer to the Sun than Neptune between April 30, 1483 and July 23, 1503, which is almost exactly the same length as the 1979 to 1999 period. Recent studies suggest each crossing of Pluto to inside Neptune's orbit lasts alternately for approximately thirteen and twenty years with minor variations. |
diagrams at wiki http://en.wikipedia.org/wiki/Pluto#Heliocentric_Distance
Pluto's composition is just too awkward for a planet out there. 4 planets before it were made of gases with hardly any cores. Yet pluto is currently thought of be like a rock slushie : A mixture of frozen methane/water and rocks. Its proxmity to the Kuiper Belt gives some sense to believe it was part of the kuiper belt of floating rocks.
What i'm surprised is that they found pluto, 20+ Au from the sun, earlier than they found the new planet, Ceres, thats between mars and jupiter.
What i'm surprised is that they found pluto, 20+ Au from the sun, earlier than they found the new planet, Ceres, thats between mars and jupiter.
1. Yes I think Pluto is a planet
2. I heard that congress decided it isn't who gave them the right!
2. I heard that congress decided it isn't who gave them the right!
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