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The Shape of the Milky Way Is Warped and Twisted (abc.net.au)

Necroloth writes: You probably thought that if you were looking at our galaxy from the outside and at a distance, you would see a thin disc of stars that orbit around a central region, but the further away from the inner regions of the Milky Way you are, the less the pull of gravity. At the outer disc, the hydrogen atoms that make up the Milky Way's gas disc are, as a consequence, warped into an S-like shape, no longer pulled together in a thin plane. A group of astronomers from Australia and China have built their "intuitive and accurate three-dimensional picture" by mapping 1339 classical Cepheids. There's a quick animation of the galaxy on the @NatureAstronomy twitter here. The study has been published in the journal Nature Astronomy.

42 comments

  1. And Earth in the bend by SuperKendall · · Score: 4, Interesting

    An interesting aspect of this is that our solar system I think is in the part where the disc starts to bend, according to this diagram of where our solar system is in the galaxy...

    It seems like it would be kind of irrelevant in the grand scheme of things, but maybe for some reason in the places where the gas discs of a universe start to bend, life it more likely for some reason. Or course, with a sample size of one you can't really extrapolate much - just seems like an interesting coincidence.

    If I'm wrong about the location I would love to know more exactly where we are.

    --
    "There is more worth loving than we have strength to love." - Brian Jay Stanley
    1. Re:And Earth in the bend by Anonymous Coward · · Score: 1

      I don't see how the two diagrams are related. But then, I don't understand what it is you mean by "starts to bend" - since it looks to me like a smooth curve. To develop, life needs two things which oppose each other: transition metals (i.e. heavy elements such as iron, molybdenum, nickle, etc.) and a surface environment relatively free of ionizing radiation. (note that these two things are only hypothetical requirements, we don't understand how life did (or could) actually develop.) Close to the galactic center both metal abundance AND radiation (gamma rays from near-by stellar activity) are high and both drop (on average) as you move radially. , I don't understand why there's any "coincidence" since both are determined -partially- by gravitational interactions/dynamics and stellar formation. A (bad) analogy would be why families live in the suburbs: jobs occur with high prob. in cities, but so does crime - it's no "coincidence". I note also that dust obscures most of the Milky Way from us, giving us an incomplete picture of our own galaxy.

    2. Re:And Earth in the bend by Sique · · Score: 5, Interesting

      On a planet with an ocean, you have an environment free from ionizing radiation: under water. On Earth, Life doesn't seem to have moved on land until enough free oxygen was in the atmosphere to create an ozone layer about 400 mio years ago. There has been another period on Earth with at least 10% of oxygen in the atmosphere about 2.1 billion years ago, causing iron in the Earth's crust to oxide and create large layers of reddish stone. It could have give rise to a first development of multicellular life, albeit the nature of the fossils is still in dispute.

      --
      .sig: Sique *sigh*
    3. Re: And Earth in the bend by Anonymous Coward · · Score: 0

      You're at the end of a looking glass commenting about lensing illusions. If you move your telescope towards deep space you'll see the same galaxies twice. Now that's really far-out, man.

      These must be the same "scientists" who explained the collapse of WTC7, which fell at the speed of gravity like there was no resistance below.

    4. Re: And Earth in the bend by Anonymous Coward · · Score: 0

      Oh sure. A miner hiding deep in the mine wants to hear you talk. He would be more likely to kick your ass

    5. Re:And Earth in the bend by Anonymous Coward · · Score: 0

      An interesting aspect of this is that our solar system I think is in the part where the disc starts to bend, according to this diagram of where our solar system is in the galaxy...

      Your mama's so fat she bent the galaxy.

    6. Re:And Earth in the bend by Tough+Love · · Score: 1

      Who woulda thunkit? The Milky Way is a giant I-phone 6

      --
      When all you have is a hammer, every problem starts to look like a thumb.
  2. The Shape of the Milky Way Is Warped and Twisted by grep+-v+'.*'+* · · Score: 3, Funny

    Just like my soul.

    Or at least personality -- instead of the SuperBowl I watched this instead. Much funner.

    I *DID* miss the Puppy Bowl though; I'm ashamed of that.

    --
    If the universe is someone's simulation -- does that mean the stars are just stuck pixels?
  3. So are the minds of the inhabitants by Anonymous Coward · · Score: 0

    Perhaps this is why humans are so twisted and broken.

  4. torque? by Anonymous Coward · · Score: 1, Interesting

    "Our Galaxy thus follows Briggs’ rule for spiral galaxies4, which suggests that the origin of the warp is associated with torques forced by the massive inner disk5. "

    I assume the force in question being referred to is gravity? Gravity induced torque?

    What's the explanation for torque here? The force along the axle where all the spins and forces are in a plane... it's observed sure, its defined in equation form, agreed, but how exactly does the accelerating spin *around* the disc cause torque *along* the axle? When the axle is at 90 degrees to the disc? All the forces and velocities are in the plane of the disc, and yet torque is along the axle?!

    Suppose the underlying mechanism is a component of spin across the thickness of the disc, and then rotation would push that component around the circumference of the disc spin, reducing the component in the direction of the axle, i.e. a force across the axle. Slowing it down would push it back into the axis across the disc, a force in the other way also along the axel.

    Suddenly torque is simple to understand, as a fairly simple mechanism, but.... not in this context.

    Gravity is an attraction only force... so that model of torque wouldn't work if gravity is a simple attraction only force.... how would it also push along the axel?

    And then there's the orientation problem again, I said it would push the spin component around the disc, and reduce the component along the axle, and that's true.... but... the two always work in a specific way, acceleration in one direction results in a force in a related direction, a specific orientation rule connects them, and so it must connect the spin. They must be spinning in a particular way, coordinated.

    It would be nice if people thought about the magic in Fleming left hand rule too... it's related
    https://news.slashdot.org/comments.pl?sid=13354206&cid=58077058

    1. Re:torque? by Anonymous Coward · · Score: 1

      May-be the plasma and magnetic lines between the stars are to blame?

    2. Re:torque? by Anonymous Coward · · Score: 0

      torque due to nearby neighbors for example, could also be a relic of halo formation if the halo is triaxial. The torque of the moon on the non-spherical earth is also what caused the celestial pole to wobble around every 23,000 years.

      I initially had to smile a bit about the article, all this hoopla, and we knew this 20 or 30 years ago already that the gas disk was warped. gas forms stars, so should we be surprised? The neat thing is that the distance to gas needs an assumption on how fast it's spinning around the center to get the distance, for this new paper they concentrated on a type of star for which we can derive the distance another way. I sure hope that the gas and star disk are nicely consistent, I have not caught up to the paper.

  5. Re:The shape of the Trump Presidency -tm at 2 year by Anonymous Coward · · Score: 0

    Fuck off, you Chinese POS shill.

  6. Re:The Shape of the Milky Way Is Warped and Twiste by Anonymous Coward · · Score: 0

    As someone, who personally has no particular political stance....

    You suck.....

  7. Re:The Shape of the Milky Way Is Warped and Twiste by Anonymous Coward · · Score: 0

    I came here to make some joke like yours. Instead I will smoke a bowl. Fuck all trolls.

  8. I told you, put it in the fridge! by Anonymous Coward · · Score: 1

    They melt really easily. No substance to them really.

  9. Knowledge brought to us by a former classmate by Quirkz · · Score: 1

    I studied undergrad physics with one of the astronomers cited in the article. Really weird reading along and then going, "Oh, I know them!"

  10. Fuck Off APK by Anonymous Coward · · Score: 0, Insightful

    Fuck Off APK

  11. Oh yeah? by bigtech · · Score: 1

    "You're Warped and Twisted!" -- Milky Way Galaxy

  12. The tree of the knowledge of good and evil by Anonymous Coward · · Score: 0

    For this reason, God sends them a powerful delusion(operation of wandering)(planet) so that they will believe the lie.

    Mystery Red of the Great American Eclipse
    It has blood on it!
    ABCNews: Eclipse makes pendulum wander

  13. Eve answered: The serpent deceived me, and I ate by Anonymous Coward · · Score: 0

    As a son of Adam & Eve, you demand Knowledge before God. You worship the creature, and not the Creator. For this reason, God sends Energeian Planes so that they will believe the lie, in order that judgment will come upon all who have disbelieved the truth and delighted in wickedness.

    But as a powerful delusion, there is a loose thread or two.

  14. Trying to "frame me" you loser? Weak... apk by Anonymous Coward · · Score: 0

    I didn't post what you replied to (you probably did) so TAKE YOUR OWN POOR ADVICE & F off.

    APK

    P.S.=> Not even a "nice try" in trying to 'frame' me you UNIDENTIFIABLE anonymous troll scumbag... apk

  15. Re:The Shape of the Milky Way Is Warped and Twiste by Anonymous Coward · · Score: 0

    A lot less cheating, corruption, corporate interference, crying, etc in Jelle's games. The suspense is just as good IMO, if not better.

  16. You can't even by Anonymous Coward · · Score: 0

    You dumb, redneck bastard! You can't even racist right. That was a reference to a gospel slave hymn sung in the fields. And the coal mine was in reference to you MAGA shits who want blacks back in the fields. Something as juvenile as "I'll go tell it to yo momma tonight" would have been a better retort.

  17. The language of arrogance? by Anonymous Coward · · Score: 0

    For me, the use of language such as "warped" and "twisted" suggests we know exactly what the milky way should look like, but doesn't.
    Yet the truth be known, we don't know, and all we have is theory, and computer simulations based on models based on theory. Yet observations contradict our models. So who's wrong here? Damn nature! It should be fined for defying our laws of physics!