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Is Pluto Actually a Mash-Up of a Billion Comets? (smithsonianmag.com)

Scientists from the Southwest Research Institute suggest Pluto may be a comet, as opposed to a planet or dwarf planet. According to a study published in the journal Icarus, Pluto could be made up of billions of comets all mashed together. Smithsonian reports: Scientists had long believed the dwarf planet Pluto was formed the way planets come to be: they start as swirling dust that's gradually pulled together by gravity. But with the realization that Pluto was a Kuiper belt dwarf planet, researchers began speculating about the origins of the icy world. The researchers turned to Sputnik Planitia -- the western lobe of the massive heart-shaped icy expanse stamped on Pluto's side -- for the task. As Christopher Glein, lead author of the paper and researcher at the Southwest Research Institute, explains to [Popular Science editor Neel V. Patel], the researchers used the data from New Horizons on this icy expanse to estimate the amount of nitrogen on Pluto and the amount that's escaped from its atmosphere.

Glein explains the conclusions in a statement: "We found an intriguing consistency between the estimated amount of nitrogen inside the [Sputnik Planitia] glacier and the amount that would be expected if Pluto was formed by the agglomeration of roughly a billion comets or other Kuiper Belt objects similar in chemical composition to 67P, the comet explored by Rosetta."
The report goes on to mention a few caveats. "For one, researchers aren't sure that comet 67P has an average comet composition," reports Smithsonian. "For another, New Horizons only captured information about Pluto at a specific point in time, which means nitrogen rates could have changed over the last billions of years. [T]here's also still the possibility Pluto formed from cold ices with a chemical composition to that of the sun."

74 comments

  1. Re: They have no idea how Pluto formed by Anonymous Coward · · Score: 0

    If aliens did create Pluto, why haven't they visited earth, or been back to say hello/kill us all for our resources?

  2. We need to drag it here for study by Anonymous Coward · · Score: 0

    Just imagine the secrets it could hold and the decades of research... Every part of it a new mystery to solve.

    1. Re: We need to drag it here for study by Anonymous Coward · · Score: 0

      Just imagine the engineering and resources needed to counter the orbital momentum it posesses, in order to lower it to Earth orbit. Then imagine all our precoius evidence evaporating in the comparably immense heat of the sun in Earth orbit.
      The tail would be magnificent.

  3. Re: They have no idea how Pluto formed by Anonymous Coward · · Score: 0

    Creation is a cop-out. It has been used to explain seasons and lightning and how flies appear in putrid meat.
    Don't continue to hide your god in the rapidly shrinking and moving gaps of scientific discovery.

  4. So ist the Earth by Anonymous Coward · · Score: 4, Insightful

    The earth is also a "smashup" of all kinds of space debris including comets.

  5. Donno by Anonymous Coward · · Score: 0

    but my last duke was by the person who came in after.

  6. Dwarf planet by phantomfive · · Score: 1

    You might as well just call it a planet. Because why not?

    --
    "First they came for the slanderers and i said nothing."
    1. Re:Dwarf planet by Anonymous Coward · · Score: 0

      Call it a Giant Comet, this is more fun.

    2. Re:Dwarf planet by phantomfive · · Score: 1

      Call it a Giant Comet, this is more fun.

      I see. Like this?
      "In 2006, Pluto, the giant dwarf comet planet, entered the Milky Way portion of the sky. This caused much consternation among lactose advocates."

      --
      "First they came for the slanderers and i said nothing."
    3. Re:Dwarf planet by PolygamousRanchKid+ · · Score: 2

      You might as well just call it a planet. Because why not?

      I would hope that astronomers would have something more important to do, than splitting hairs over the exact definition of a planet.

      I suggest that astronomers tear a page out of Existentialism dogma, and say that Pluto just is. So your suggestion would read:

      You might as well just call it a Pluto.

      As in:

      “Last night in the latrine. Didn't you whisper that we couldn't punish you to that other dirty son of a bitch we don't like? What's his name?"

      "Yossarian, sir," Lieutenant Scheisskopf said.

      "Yes, Yossarian. That's right. Yossarian. Yossarian? Is that his name? Yossarian? What the hell kind of a name is Yossarian?"

      Lieutenant Scheisskopf had the facts at his finger tips. "It's Yossarian's name, sir," he explained.” Joseph Heller, Catch-22

      --
      Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
    4. Re:Dwarf planet by phantomfive · · Score: 1

      I think most Americans have forgotten the political aspects of Pluto, but I kind of wonder if European astronomers have not, and were annoyed at the political process from nearly a hundred years ago. To enhance your point:

      As long as we're making up definitions, we could easily say, "Planets are a body of certain size orbiting a star.......and as a special case, Pluto." Definitions being entirely arbitrary, such a definition would help remind future generations that definitions in fact are.......entirely arbitrary. Of course we can define things in ways that are useful to us, but there are two types of people in the world: those who divide everything into two groups and those who don't.

      --
      "First they came for the slanderers and i said nothing."
    5. Re:Dwarf planet by squiggleslash · · Score: 1

      I would hope that astronomers would have something more important to do, than splitting hairs over the exact definition of a planet.

      Unfortunately the fact a relatively small proportion don't have anything better to do is why the IAU created this ridiculous "Dwarf planet" classification in the first place. As I understand it, it's not even a definition supported by most astronomers (who would be the first to point out no planet has "cleared its orbit", and aren't exactly sure why that minority is so upset at the idea that the Solar System might have thousands of planets.

      Also, is it me or is the summary bizarre? It proposes that astronomers only became interested in Pluto's formation after it was "discovered" (not redefined) to be a dwarf planet. It also uses the term comets when, presumably, it just means space debris, and seems to be treating it as unusual that a planet would form from space debris slowly clumping together over billions of years due to gravity.

      --
      You are not alone. This is not normal. None of this is normal.
    6. Re:Dwarf planet by tsa · · Score: 1

      Why is it called Pluto anyway? Who names a planet after a cartoon dog?

      --

      -- Cheers!

    7. Re:Dwarf planet by phantomfive · · Score: 1

      Why is it called Pluto anyway? Who names a planet after a cartoon dog?

      To get revenge on the *elite* astronomers I'm going to change its name and unofficially call the the Planet Spongebob.

      --
      "First they came for the slanderers and i said nothing."
    8. Re: Dwarf planet by jd · · Score: 1

      The sole function of a classification is to group all like things in a way that distinguishes them unambiguously from all unlike things, without respect to space, time, means of observing or observer. In other words, the distinguishing feature must be intrinsic not extrinsic.

      If A is the set of all objects in the class, B is the set of all things not in the class, E is the empty set and U is the universal set, A /\ B = E and A \/ B = U.

      Since only prediction is valid, the class has a prediction P such that for all elements a in A, P(a) is true. Since only the simplest model is permitted, there must be no adjoining A' for which P(a') is true.

      I really don't see the problem in proper hard science ontologies, it's not like a planetary mass is subject to a philosophical debate over what constitutes mass. Rigour and formalism are quite sufficient for this, it's a shame the IAU is incapable of either.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  7. Trump the traitor will die in prison either way by Anonymous Coward · · Score: 0

    So you can pray to whoever you want but traitors don't go up.

  8. Hmmm by hcs_$reboot · · Score: 2

    According to my own calculation based on the planet/dwarf planet structure, I'd say only 999,980,443 comets.

    --
    Slashdot, fix the reply notifications... You won't get away with it...
    1. Re:Hmmm by Anonymous Coward · · Score: 0

      I eagerly await the administration’s regulations protecting pagers, fax machines, and Blockbuster. https://t.co/ykLJHT4OvK

      — Arnold (@Schwarzenegger) June 1, 2018

  9. Re:They have no idea how Pluto formed by Joce640k · · Score: 0
    --
    No sig today...
  10. Re:The ***ABSURDITY*** of claiming to be atheist by phantomfive · · Score: 3, Funny

    You proved the existence of God in a single Slashdot post! Why didn't we ever think of this??? Somehow you are greater than Socrates, Descartes, Hegel, and LeBron combined! I bow to your intellect.

    Now can you give me a pony?

    --
    "First they came for the slanderers and i said nothing."
  11. Pluto IS a planet by Anonymous Coward · · Score: 0

    According to my definition of a rocky planet, Pluto needs:
    - a round shape
    - a crust
    - a hot core or a previously hot core

    Pluto passes all three requirements, therefore it's a planet.

    Questions?

    1. Re: Pluto IS a planet by Anonymous Coward · · Score: 0

      Npt really..

    2. Re:Pluto IS a planet by Waffle+Iron · · Score: 1

      According to my definition of a rocky planet, Pluto needs:
      - a round shape
      - a crust
      - a hot core or a previously hot core

      Pluto passes all three requirements, therefore it's a planet.

      Questions?

      Yes: So you're saying that the earth's moon is also a planet?

    3. Re: Pluto IS a planet by jd · · Score: 1

      The moon was at one point molten, but that's not the same as saying it ever had a molten core. There's no evidence that I know of that it had a distinct core.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    4. Re: Pluto IS a planet by Hognoxious · · Score: 1

      For a long time I thought the same, but a few weeks ago I found out that it does.

      It is however only about the size of Belgium and probably contains considerably less beer.

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
  12. No. by Anonymous Coward · · Score: 0

    There, settled. If you have more question; feel free to ask!

    1. Re:No. by MrMr · · Score: 1

      That was easy. You just applied the 'if the headline ends in a question mark, the answer is no' rule of slashdot.

  13. Mash-Up?! Copyright lawsuit incoming!!! by Anonymous Coward · · Score: 0

    "In other news, today, after enduring roughly 1B comet collisions, dwarf planet Pluto may be about to be shattered when a joint MPAA/RIAA copyright lawsuit hits it next month over claims that it is, in fact, a Mash-Up. Representatives of both associations have claimed that "no longer can they allow Pluto to continue to be a safe harbour for space pirates". Representatives for Pluto could not be reached, but close friend and notable spacecraft New Horizons commented that "it's all Fair-Use, Pluto has survived worse and will prevail". This news follows Pluto's fall from grace when it was considered to not be a proper planet, any more, and received the newly created title of dwarf planet. The former planet has been trying to make its way back to the limelight, ever since."

  14. Re: They have no idea how Pluto formed by phantomfive · · Score: 1, Insightful

    Ok, so why do qyou believe in God then? It seems reasonable that Pluto was formed by some kind of natural process, even if we can't figure it out yet. After all, we've figured out many natural processes that were mysteries before.

    --
    "First they came for the slanderers and i said nothing."
  15. 1 BILLION COMETS!!! by Anonymous Coward · · Score: 0

    Buh ha ha ha ha
    Buh ha ha ha ha
    Buh ha ha ha ha
    ~Dr. Evil

  16. Actually no! by nospam007 · · Score: 1

    It's a dog.

  17. Ancient aliens! by Anonymous Coward · · Score: 0

    Your entire post uses the EXACT same logic as the Ancient Aliens tv show:

    Science cannot (yet) explain it therefore it can ONLY be Ancient Aliens! Er uh I mean a bearded dude in the sky looking down on all of us who rewards the good kids and punishes the bad.

    I have now proven by your logic that Pluto could only have been created by Santa Claus.

  18. Re:They have no idea how Pluto formed by angel'o'sphere · · Score: 1

    when science does not actually offer an alternative to God that has substantial proof.
    Why would science attempt that? What exactly is an alternative to God?

    You believers mix a lot of things up with science. E.g. if there was a scientific proof for (a) God, I still would not _believe_ in him/her _pray_ to him/her or _worship_ him/her: because I'm not a religious person, plain and simple.

    --
    Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
  19. Re:The ***ABSURDITY*** of claiming to be atheist by angel'o'sphere · · Score: 1

    But look how much typing he needed for this! All those letters make my mind confused. I'm not sure anymore if I'm an Atheist, after all he is right: I never left the solar system! But I plan that for my next vacation!

    --
    Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
  20. Re:The ***ABSURDITY*** of claiming to be atheist by phantomfive · · Score: 1

    Hey, for that, who's your travel agent? What website do you use?

    --
    "First they came for the slanderers and i said nothing."
  21. Re:The ***ABSURDITY*** of claiming to be atheist by angel'o'sphere · · Score: 1

    Well,
    so far I only checked Air France's web site ...

    --
    Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
  22. Re:They have no idea how Pluto formed by MightyMartian · · Score: 1

    Is being challenged a bad thing? Just saying "God did it" answers no questions. It's a claim without utility.

    --
    The world's burning. Moped Jesus spotted on I50. Details at 11.
  23. Pluto belongs to Taylor Swift by Anonymous Coward · · Score: 0

    Pluto doesn't have that giant heart on it for nothing, you know. It belongs to Taylor Swift. Delicate!

  24. Poor Pluto by LynnwoodRooster · · Score: 1

    They're just not going to stop until they permanently eliminate it as a planet...

    --
    Browsing at +1 - no ACs, I ignore their posts. So refreshing!
  25. Yes, but they say it better by Roger+W+Moore · · Score: 1

    Yes. This news seems to be a result of someone re-stating how large objects form in the solar system to make it sound sexier encountering a journalist who has never heard of this before. Tomorrow's article will be "Sun formed from particles created at the birth of the universe" to be followed by "Earth contains fossilized remnants of a 6 billion-year-old supernova".

    1. Re:Yes, but they say it better by Hognoxious · · Score: 1

      Wow. You mean, like, we are stardust?

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    2. Re:Yes, but they say it better by Roger+W+Moore · · Score: 1

      Not all of us. The hydrogen in us is probably "big bang"-dust.

  26. Re:The ***ABSURDITY*** of claiming to be atheist by Anonymous Coward · · Score: 0

    The canned anti-catholic, anti-orthodox and anti-atheist comment ironically draws from the Anglican pastors. So maybe the other churches and atheists are evil only half the way?

  27. Earth is not really a planet by Anonymous Coward · · Score: 0

    The Earth, and all other planetary objects, is nothing more than a lot of dust and rocks mashed together. Ergo, using the same logic, we do not live on a planet. Sorry people.

  28. Following their logic by McFortner · · Score: 1

    Well, then the Earth is nothing but an untold number of billions of asteroids mashed together. Time to downgrade Earth!

    --
    Beware of Sales Reps bearing gifts.
  29. Pluto won't be the first by Dasher42 · · Score: 1

    Pluto won't be the first thing in the cosmos to break definitions and it won't be the last. The current definition of planet isn't a good one.

    "A celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit."

    But if these bodies at some point have a molten core, complex geological features, and long-term orbital stability, I find the cleared neighborhood requirement to be unfounded.

    If the Earth was a bit less massive and the Moon a bit more, the center of gravity for the system would be outside of Earth. Why wouldn't it be a binary of two planets then? Isn't it a matter of time until we discover these even in the data on exoplanets we've already got? Pluto is such a system.

    When we find Planet IX out there, and it's likely to be 10x the mass of earth, it'll likely have an orbit that is crossed by a great many bodies, some of which may be larger than Pluto and Eris. Is its status as a planet going to be in doubt every time we find another large object in the Kuiper belt?

    There are planemos we've detected that may well have not formed in a star's proto-planetary disk but are larger than Jupiter. How are they not planets of a sort?

    If we're just trying to keep the planet count in our solar system low, what for exactly?

    I find that definitions with excessively sharp and arbitrary boundaries where physics shows us a gradual spectrum are a product of humans trying to impose their thinking, instead of adapt it to the world.

  30. Re: The ***ABSURDITY*** of claiming to be atheist by Anonymous Coward · · Score: 0

    But I AM an atheist, I swear to God I am, so there!

  31. Re: The ***ABSURDITY*** of claiming to be atheist by Anonymous Coward · · Score: 0

    Nothing can be completely proved. All we can do with science is is go through a process called falsification to remove as much doubt about a posiability as we can.
    The result of such analysis is that if you can't falsify it, it is not within the realm of science.
    Since there is no acceptable test to disprove god, god is not within the realm of science. Thus you can not prove the existence of god. Since atheists believe is science, god is not part of their belief.
    Stating that something is impossible to disprove, is proof of its existence, just being simple minded, no matter how long winded or how many times you state it.

    Okay now that that is out of the way. Please post something revelant to the discussion.

  32. Why the cabal of Pluto haters? by SuperKendall · · Score: 0

    It's really mysterious to me why so many "scientists" seem to have it in for Pluto... sometimes called "The Dark Planet", the only conclusion I can come to is racism.

    --
    "There is more worth loving than we have strength to love." - Brian Jay Stanley
  33. they were the authorities by Anonymous Coward · · Score: 0

    and they were the ones who would have to use the definition. So it is kinda correctfor them to make the definition. And all of those who WANTED to vote WERE ALLOWED. Most of the whiners didn't care and didn't want to stay for the vote and left. Only when it turned out pluto wasn't a planet did they complain and bitch. Mostly because they saw a loss of prestige for the USA. Ceres was a planet once.

    1. Re: they were the authorities by jd · · Score: 1

      A lot of people rely on proper classification. Those modelling solar system dynamics, astrophysicists, planetary scientists.

      If you want to make scientific predictions and then test them, you need the correct model. That's kind of an obvious duh.

      If you're in charge of budgets, you want maximum return for the money. Exploring planets yields more science per square foot than an asteroid or comet.

      Astronomers just have to point their big shiny... telescopes at big, shiny... things and map them. They don't do anything else that's useful. Unless they were Patrick Moore.

      https://m.youtube.com/watch?v=...

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  34. a list of 9 things is a worse one. by Anonymous Coward · · Score: 0

    And that is all you have for it instead. Every other option either still keeps pluto out or makes for hundreds to put in to the list. You just don't know WHY the definition was required and you're butthurt over "losing" a planet. Ceres was a planet once. It got demoted to a new class: asteroids.

    1. Re: a list of 9 things is a worse one. by jd · · Score: 1

      Why should I care how many entries there are under a good definition? I care about having a good definition.

      Here's an example of a good definition:

      A mass that has a single core, a well-defined gravitationally-shaped layered structure, that does not undergo nuclear fusion that formed within a star system.

      Why is this good?

      1. It's predictive. I have a hypothesis that can be falsified, that all objects of this type will behave in ways that all objects not of this type will not behave in.

      2. It applies to extrasolar objects and rogue planets.

      3. It is dependent only on intrinsic, not extrinsics. That makes the classification invariant unless the object itself is changed.

      4. Science is not a democracy, it is a search for ever-greater understanding. Politics is a game for fools played by idiots.

      5. The same definition has value and meaning whether you're a planetary scientist, geologist, cosmologist, colonist, miner or even astronomer. One definition to rule them all and in the darkness beat them over the head with a 2x4.

      You may not agree with the definition, but this definition makes Pluto a planet and Eris, Vesta, Haumea and Makemake not planets.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  35. Re: They have no idea how Pluto formed by phantomfive · · Score: 1

    Ok, but you ignored the question. Why do you believe in God then?

    --
    "First they came for the slanderers and i said nothing."
  36. What we know about Pluto by jd · · Score: 1

    1. It has liquid water
    2. It has an evolving surface
    3. Including atmosphere, it's larger than Earth

    What we know about the Kuipier Belt

    1. It has an Earth-sized "dwarf planet" (it's a dwarf because it hasn't cleared its orbit, even if it's the size of Jupiter), although Pluto is not that planet

    I see nothing here that says "comet" or indeed anything that makes that relevant as to what class of object it is.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  37. Re: The ***ABSURDITY*** of claiming to be atheist by jd · · Score: 1

    Ponies on Slashdot have to be pink and collected from Cute Overload.

    Bonus karma for those who remember why.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  38. Re: The ***ABSURDITY*** of claiming to be atheist by phantomfive · · Score: 1

    No clue why.

    --
    "First they came for the slanderers and i said nothing."
  39. Re: They have no idea how Pluto formed by jd · · Score: 1

    You're assuming there that the dust condenses sequentially, at a uniform rate, from a single seed particle.

    What if, and I know this is a wild assumption, none of those assumptions actually held up? That the dust cloud condensed at multiple points in an accelerating fashion in three dimensions?

    A quick calculation then shows Pluto as requiring slightly under a century to form.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  40. Re: They have no idea how Pluto formed by jd · · Score: 1

    The theory of planetary formation contains three types of model - ones that produce predictions you can test in the lab, ones that produce predictions you can test via simulation, and ones that produce predictions you can test via astronomy.

    Simulations produce additional predictions which can be tested either in the lab or via astronomical observation, so you always end up with direct observation.

    So, no, nothing in real science is by faith and everything that can be done can be done with real science.

    Invoke God all you like, but I can find more photos of accretion disks and planets in the process of forming than you can find of God.

    Besides, which God? There are 200,000 religions out there and I bet you didn't choose yours by any process better than the one you ridicule others for.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  41. Re: They have no idea how Pluto formed by jd · · Score: 1

    Would it matter if you were? Religious people don't "believe in" chairs or worship them. Therefore a scientist who has proof of a God should not worship them. Not that any such proof is likely.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  42. Re: They have no idea how Pluto formed by phantomfive · · Score: 1

    I started believing in God after reading books.

    Well what book then?

    This is a typical tacit for arguing with people you disagree with, especially if you cannot dispute the comments directly

    I completely disputed your main point. If you don't believe in God a priori, then there is no reason to believe he created Pluto in particular. You had no answer to that.

    --
    "First they came for the slanderers and i said nothing."
  43. Re: They have no idea how Pluto formed by phantomfive · · Score: 1

    Your argument is flawed in that it says the conclusion would be invalidated by the method by which it came about

    The conclusion isn't invalid: it is a viable explanation for the creation of Pluto. Your problem is that there are many viable explanations for the creation of Pluto, and there is no particular reason to believe that your choice is the correct one out of so many.

    so you instead try to back track into my history and motivation.

    I already know your motivation: you are a devoted Christian. I don't need to figure out your motivation. I'm more interested in seeing if you have any interesting ideas. If not, then that's too bad.

    --
    "First they came for the slanderers and i said nothing."
  44. Re: They have no idea how Pluto formed by phantomfive · · Score: 1

    Now you are doing it again. You are saying, "I have explanation A, B, and C......but none of those work so it must have been God." Sometimes the answer is that we don't know yet, but we will know eventually.

    --
    "First they came for the slanderers and i said nothing."
  45. Re: They have no idea how Pluto formed by phantomfive · · Score: 1

    You are right about sherlock holmes. But you haven't eliminated all the alternatives yet. I can show you why. There was a time when no one knew how diseases spread. Some people said it was bad air, but you could eliminate that. There were no known possibilities. Eventually though, someone invented the microscope and germs were discovered.

    --
    "First they came for the slanderers and i said nothing."