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Astronomers reveal first image of the black hole at the heart of our galaxy

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Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#31

Post by rootbear »

markus_zhang wrote: post #19
adgjlsfhk1 wrote: post #17

Earlier quoted context omitted.

GR and quantum field theory don't work together, so at least one of them is wrong, and it would be good to figure out which and how.

Thanks. Can you please point me to some popular science article that explains why the two do not agree with each other?

Brian Greene's "The Elegant Universe" does a very good, completely non-technical, job of explaining the conflict between the two theories. It then goes on to explain why String Theory is one possible solution to the problem.

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#32

Post by jrgd »

I find the whole thing amazing and captivating - yet the image is … huh … slightly underwhelming. It looks like some gaussian blurred random image. I wish it could be the kind of crisp image JWST ‘sent’.

It’s difficult to force oneself to not romanticise these un-visible things based on artists visualisation we got accustomed to.

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#33

Post by m-watson »

jackallis wrote: post #18

ithought this was old news from couple of years ago, did i miss something?

That was a different black hole that is further away. This black hole is much closer in the center of our galaxy. So now we have pictures of 2 black holes to compare!

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#34

Post by wumpus »

fasteddie31003 wrote: post #29

I am very skeptical of the Event Horizon Telescope (EHT) images because they are not following a scientific method that results in a true representative image of their target. In my opinion astronomy is jumping the shark with these images by making this a big PR stunt. I've looked at their methods for their earlier images and they seem to be hunting for a circle that looks like a black hole in their data. The EHT's f…

Didn’t I already reply to you weeks ago about a similar comment? Now you can read the actual papers which explain in detail why your comment is incorrect.

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#36

Post by malfist »

fasteddie31003 wrote: post #29

I am very skeptical of the Event Horizon Telescope (EHT) images because they are not following a scientific method that results in a true representative image of their target. In my opinion astronomy is jumping the shark with these images by making this a big PR stunt. I've looked at their methods for their earlier images and they seem to be hunting for a circle that looks like a black hole in their data. The EHT's f…

Why do you think you know more about astronomy than a team of scientists publishing peer reviewed information?

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#37

Post by nuccy »

murat124 wrote: post #24

This image apparently has not captured as much attention as the image of M87, but anyway, I have a question, maybe someone with the knowledge can answer: Between the images of M87 and Sgr A, one noticeable difference is that the image of M87 appears to have a single cluster of light "below" the blackhole whereas the image of Sgr A has three surrounding the blackhole. Is this because of the mass and spin differences b…

Likely it is not about the mass, but about the arrangement of clumps of matter circling around the super massive black holes in the accretion disk. During the presentation they speak about much shorter time-scales for Sgr A* in comparison with M87, saying that for Sgr A* they were "making the image while it was changing" [1]. Also see other variations of the image (many teams analyzed data independently) here [2].

1. https://www.youtube.com/watch?v=rIQLA6lo6R0&t=1930s

2. https://physicsworld.com/wp-content/uploads/2022/05/First-SG... from https://iopscience.iop.org/article/10.3847/2041-8213/ac6429

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#38

Post by markus_zhang »

rootbear wrote: post #31
markus_zhang wrote: post #19

Earlier quoted context omitted.

Thanks. Can you please point me to some popular science article that explains why the two do not agree with each other?

Brian Greene's "The Elegant Universe" does a very good, completely non-technical, job of explaining the conflict between the two theories. It then goes on to explain why String Theory is one possible solution to the problem.

Perfect! Thank you.

Re: Astronomers reveal first image of the black hole at the heart of our galaxy

#40

Post by fasteddie31003 »

malfist wrote: post #36
fasteddie31003 wrote: post #29

I am very skeptical of the Event Horizon Telescope (EHT) images because they are not following a scientific method that results in a true representative image of their target. In my opinion astronomy is jumping the shark with these images by making this a big PR stunt. I've looked at their methods for their earlier images and they seem to be hunting for a circle that looks like a black hole in their data. The EHT's f…

Why do you think you know more about astronomy than a team of scientists publishing peer reviewed information?

Peer reviewed has nothing to do with the scientific method. It is just a layer of scientific bureaucracy. Just give me a calibration image of another celestial body and I'll be happy.
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