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Thread: More of a snuggle than a thump.

  1. #1
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    Default More of a snuggle than a thump.

    New Horizons spacecraft 'alters theory of planet formation'

    By Pallab Ghosh Science correspondent, BBC News, Seattle

    • 13 February 2020




    The Kuiper belt object Arrokoth is a pristine remnant of planet formation in action Scientists say they have "decisively" overturned the prevailing theory for how planets in our Solar System formed.
    The established view is that material violently crashed together to form ever larger clumps until they became worlds.
    New results suggest the process was less catastrophic - with matter gently clumping together instead.
    The study appears in Science journal and has been presented at the American Association for the Advancement of Science meeting in Seattle.
    The study's lead researcher, Dr Alan Stern, said that the discovery was of "stupendous magnitude".

    "There was the prevailing theory from the late 1960s of violent collisions and a more recent emerging theory of gentle accumulation. One is dust and the other is the only one standing. This rarely happens in planetary science, but today we have settled the matter," he told BBC News.
    The claim arises from detailed study of an object in the outer reaches of the Solar System. Named Arrokoth, the object is more than six billion km from the Sun in a region called the Kuiper belt. It is a pristine remnant of planet formation in action as the Solar System formed 4.6 billion years ago, with two bodies combining to form a larger one.
    https://www.bbc.co.uk/news/science-environment-51295365
    It really is quite difficult to build an ugly wooden boat.

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  2. #2
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    Default Re: More of a snuggle than a thump.

    Neat.
    Now ai can call that stuff on the floor of the garage 'pristine remnants of boat creation'

  3. #3
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    Default Re: More of a snuggle than a thump.

    Not with a bang but a whimper?
    If I use the word "God," I sure don't mean an old man in the sky who just loves the occasional goat sacrifice. - Anne Lamott

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    Default Re: More of a snuggle than a thump.

    Quote Originally Posted by David W Pratt View Post
    Neat.
    Now ai can call that stuff on the floor of the garage 'pristine remnants of boat creation'
    Wood shavings and sawdust, not so much. Dribbles of glue, paint, and dropped screws, definitely.
    It really is quite difficult to build an ugly wooden boat.

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  5. #5
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    Default Re: More of a snuggle than a thump.

    This rarely happens in planetary science, but today we have settled the matter
    bold
    Simpler is better, except when complicated looks really cool.

  6. #6
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    Default Re: More of a snuggle than a thump.

    Looks like God passed a kidney stone. JayInOz

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    Default Re: More of a snuggle than a thump.

    Does this mean that Chicxulub never happened?

  8. #8
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    Default Re: More of a snuggle than a thump.

    Quote Originally Posted by Jimmy W View Post
    Does this mean that Chicxulub never happened?
    If anything the mess that Chicxulub made is a strong argument in support of this thesis.
    It really is quite difficult to build an ugly wooden boat.

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  9. #9
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    Default Re: More of a snuggle than a thump.

    I suspect that there are both soft and hard collisions. Some things softly come together, some drawn by gravitational forces. Other times things moving faster collide. Just because two things came together softly doesn't mean that everything did. There are a lot of impact craters in our solar system.

  10. #10
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    Default Re: More of a snuggle than a thump.

    Quote Originally Posted by Jimmy W View Post
    I suspect that there are both soft and hard collisions. Some things softly come together, some drawn by gravitational forces. Other times things moving faster collide. Just because two things came together softly doesn't mean that everything did. There are a lot of impact craters in our solar system.
    I think that the argument is that hard collisions will result in an expanding cloud of hot debris.
    Think of what would happen if Chicxulub hit another similarly sized body at those impact speeds. Both bodies would vaporise, splash and be thrown everywhere. After all, Chicxulub is now an inch thick layer of iridium rich rock laid down all over the Earth.
    That would not lead to the accretion of planets.
    It really is quite difficult to build an ugly wooden boat.

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