Scientists confirm that the first black hole ever imaged is actually spinning

Comments

• AbouBenAdhem@lemmy.world ⁨1⁩ ⁨year⁩ ago

  The title kind of misses the point—of course it spins; it would be remarkable if it didn’t.

  The really interesting bit is how relativistic frame dragging causes its spin axis to precess.

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  • hotdaniel@lemmy.zip ⁨1⁩ ⁨year⁩ ago

    Does the black hole spin? Or does the stuff outside the black hole spin? 🤔

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    • AbouBenAdhem@lemmy.world ⁨1⁩ ⁨year⁩ ago

      The black hole and the stuff outside it constitute a single system, and within that system, angular momentum is conserved. So as objects cross the event horizon, their angular momentum is transferred to the black hole.

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    • scarabic@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Isn’t most everything spinning? Seems like having zero angular momentum would be rare and remarkable. I’m not even sure how exactly to define zero momentum in terms of reference frames.

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    • tdawg@lemmy.world ⁨1⁩ ⁨year⁩ ago

      If you’re asking that then you first need to ask what the distinction between the two is. and further does it even make sense for one to spin and not the other

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    • KidsTryThisAtHome@lemm.ee ⁨1⁩ ⁨year⁩ ago

      It’s in space and everything is relative, how do we know *everything else" isn’t just spinning around the black hole? 🤔

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    • sleep_deprived@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Yes.

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  • moistclump@lemmy.world ⁨1⁩ ⁨year⁩ ago

    Can you ELI5 relativistic frame dragging and process?

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• DemBoSain@midwest.social ⁨1⁩ ⁨year⁩ ago

  I guess the next questions would be

  1. How fast? Really fast? Does this question even make sense?
  2. What does this say about the inside of the event horizon? Does it say anything? Is this black hole leaking real information?
  3. Is black hole spin quantized like quantum spin? Is it spin-up or spin-down?

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  • anlumo@lemmy.world ⁨1⁩ ⁨year⁩ ago

    Quantum Physics “spin” has nothing to do with actual spinning. It’s just a weirdly named property of particles.

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    • grabyourmotherskeys@lemmy.world ⁨1⁩ ⁨year⁩ ago

      I’ve always thought that they should have just named the properties something like P1, P2, etc. So there’s no connotation.

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    • MaggiWuerze@feddit.de ⁨1⁩ ⁨year⁩ ago

      I thought “spinning” was meant rather literally in this case and not in some quantum sense

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• squirrelwithnut@lemmy.world ⁨1⁩ ⁨year⁩ ago

  I thought we already knew they spun, given the incredible amount of angular momentum in their accretion disks. Seems like a “duh” thing to prove with image data that the physics data already implied.

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  • Smokeydabear94@lemmy.world ⁨1⁩ ⁨year⁩ ago

    I thought so as well but the article says the spin doesn’t match the accretion disc, I’m not sure if that’s s significant aspect of the discovery possibly? I’m not well versed in relativity to be honest

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    • moistclump@lemmy.world ⁨1⁩ ⁨year⁩ ago

      What’s an accretion disc?

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• CanadianCorhen@lemmy.ca ⁨1⁩ ⁨year⁩ ago

  That’s really cool! It must have been hard to take that incredibly low res picture, and extract this much information out of!

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• stevedidWHAT@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Plug time:

  Can’t wait for Anton on YouTube (Link ) to upload somethin about this.

  Man explains things so nicely and so well. Always somethin interesting and it’s less time spent doom scrolling or listening to people yell at each other in comments

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  • PipedLinkBot@feddit.rocks [bot] ⁨1⁩ ⁨year⁩ ago

    Here is an alternative Piped link(s):

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• moistclump@lemmy.world ⁨1⁩ ⁨year⁩ ago

  I came here to be excited but the comments seem grumpy and I don’t know any what of the words mean that people are using.

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• PhlubbaDubba@lemm.ee ⁨1⁩ ⁨year⁩ ago

  This is a confirmation that was needed to accurately calculate the size of the black holes right?

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• Lord_McAlister@lemmy.world ⁨1⁩ ⁨year⁩ ago

  I mean the majority of black holes spin… It’s kinda fundamental to their existance as most things in the universe have motion and when you super compress those things into a black hole, that motion has to go somewhere.

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• jBlight@lemmy.world ⁨1⁩ ⁨year⁩ ago

  It’s actually Goku gathering energy for a spirit bomb

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• bionicjoey@lemmy.ca ⁨1⁩ ⁨year⁩ ago

  Good video covering black hole spinning in the film Interstellar:

  youtu.be/Z4oy6mnkyW4

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  • PipedLinkBot@feddit.rocks [bot] ⁨1⁩ ⁨year⁩ ago

    Here is an alternative Piped link(s):

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• ryannathans@aussie.zone ⁨1⁩ ⁨year⁩ ago

  Yeah cool but how many rpm

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• JoMomma@lemm.ee ⁨1⁩ ⁨year⁩ ago

  Is there any reason to have ever believed that they didn’t spin?

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  • bjoern_tantau@swg-empire.de ⁨1⁩ ⁨year⁩ ago

    Not really. But it’s always good to get confirmation of our theories. And it’s usually even more exiting to find an error in a well established theory.

    And then you’ve got to consider that at least mathematically a black whole doesn’t have any volume, so what could actually spin in something that’s infinitely small? This more or less confirms that this is bullshit.

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