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General Discussions => Skepticism / Science Talk => Topic started by: Tassie Dave on April 10, 2019, 04:16:21 PM

Title: First image of Black Hole
Post by: Tassie Dave on April 10, 2019, 04:16:21 PM
Astronomers have produced the first ever image of a Black Hole, at the centre of the Messier 87 galaxy.

Quote
Over several days in April 2017, eight radio telescopes in Hawaii, Arizona, Spain, Mexico, Chile, and the South Pole zeroed in on Sag A* and M87.

Knitted together, they formed a virtual observatory some 12,000 kilometres across — roughly the diameter of Earth.

“The data is like an incomplete puzzle set,” said team member Monika Moscibrodzka, an astronomer at Radboud University. “We only see pieces of the real true image, and then we have to fill in the gaps of the missing pieces.” In the end, M87 was more photogenic. Like a fidgety child, Sag A* was too “active” to capture a clear picture, the scientists said.

“What we see in the image is the shadow of the black hole’s rim — known as the event horizon, or the point of no return — set against the luminous accretion disk,” Gueth told AFP.

(https://i.imgur.com/rgfdKVI.png)

https://www.news.com.au/technology/science/space/first-photo-of-a-black-hole-revealed-astronomers-capture-image-of-cosmic-phenomenon/news-story/2c66b4258c6aab47439840df895f160f
Title: Re: First image of Black Hole
Post by: wastrel on April 10, 2019, 08:01:52 PM
Is the accretion disc really "brighter" on one side I wonder?
Title: Re: First image of Black Hole
Post by: heyalison on April 10, 2019, 08:12:04 PM
Is the accretion disc really "brighter" on one side I wonder?

This video explains the image, it's pretty neat:

https://youtu.be/zUyH3XhpLTo
Title: Re: First image of Black Hole
Post by: Noisy Rhysling on April 11, 2019, 07:38:46 AM
Short answer: The disc is brighter on the closer side because the junk is coming at us. /nonscientist
Title: Re: First image of Black Hole
Post by: brilligtove on April 11, 2019, 07:47:27 AM
Not a bad nonscientist answer. :) The video is very well done, with physical props that really helped me understand what the picture means.
Title: Re: First image of Black Hole
Post by: wastrel on April 11, 2019, 11:20:33 AM
Is the accretion disc really "brighter" on one side I wonder?

This video explains the image, it's pretty neat:

https://youtu.be/zUyH3XhpLTo

Exactly what I needed, explained it perfectly. Thanks!!
Title: Re: First image of Black Hole
Post by: brilligtove on April 11, 2019, 04:49:18 PM
I went so far as to do a screen cap, mark it up with the various dimensions, and then completely forget to post it.  ::)

The next video in Veritasium talks about what they found and why it looks that way. Worth a watch.
Title: Re: First image of Black Hole
Post by: Gigabyte on April 13, 2019, 05:59:18 PM
(https://pbs.twimg.com/media/D36UwseWwAAi3rv.jpg)
Title: Re: First image of Black Hole
Post by: Noisy Rhysling on April 13, 2019, 06:35:50 PM
Boss Lady lol'd.  ;D
Title: Re: First image of Black Hole
Post by: John Albert on April 13, 2019, 07:15:00 PM
Is the accretion disc really "brighter" on one side I wonder?

This video explains the image, it's pretty neat:



Exactly what I needed, explained it perfectly. Thanks!!

Veritasium is def one of the best science channels on YouTube, but Derek Muller made a factual error in that video.

The first black hole imaged by the EHT is not in fact Sagittarius A* (https://en.wikipedia.org/wiki/Sagittarius_A*).

It's the supermassive black hole at the center of the galaxy NGC 4486 (https://en.wikipedia.org/wiki/Messier_87), and has since been given the name Powehi (https://www.cnn.com/2019/04/12/world/black-hole-name-powehi-scli-intl/index.html).
Title: Re: First image of Black Hole
Post by: Tassie Dave on April 13, 2019, 07:40:12 PM
Veritasium is def one of the best science channels on YouTube, but Derek Muller made a factual error in that video.

The first black hole imaged by the EHT is not in fact Sagittarius A* (https://en.wikipedia.org/wiki/Sagittarius_A*).

It's the supermassive black hole at the center of the galaxy NGC 4486 (https://en.wikipedia.org/wiki/Messier_87), and has since been given the name Powehi (https://www.cnn.com/2019/04/12/world/black-hole-name-powehi-scli-intl/index.html).

He is talking before the release of the image. He is only wrong in hindsight. Sagittarius A was one of the 2 black holes they were trying to image. Messier 87 ended up being the better image.
Title: Re: First image of Black Hole
Post by: John Albert on April 14, 2019, 09:22:04 AM
Veritasium is def one of the best science channels on YouTube, but Derek Muller made a factual error in that video.

The first black hole imaged by the EHT is not in fact Sagittarius A* (https://en.wikipedia.org/wiki/Sagittarius_A*).

It's the supermassive black hole at the center of the galaxy NGC 4486 (https://en.wikipedia.org/wiki/Messier_87), and has since been given the name Powehi (https://www.cnn.com/2019/04/12/world/black-hole-name-powehi-scli-intl/index.html).

He is talking before the release of the image. He is only wrong in hindsight. Sagittarius A was one of the 2 black holes they were trying to image. Messier 87 ended up being the better image.

That's fair.

I didn't know they also imaged Sag A* with the same setup. I'd like to see that image as well.
Title: Re: First image of Black Hole
Post by: CarbShark on April 14, 2019, 02:02:20 PM
I wanna see the black hole movie.


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Title: Re: First image of Black Hole
Post by: Captain Video on April 14, 2019, 02:17:09 PM
I wanna see the black hole movie.


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Maximilian scared the crap out of me as a kid but that movie inspired me to learn more about space. Most kids had a dinosaur phase but I had a black hole phase. Of course if you watch it now it does not hold up very well.
Title: First image of Black Hole
Post by: CarbShark on April 14, 2019, 03:33:40 PM
What I mean is I want them to take enough images of this black hole to make a video





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Title: Re: First image of Black Hole
Post by: Noisy Rhysling on April 14, 2019, 03:58:40 PM
What I mean is I want them to take enough images of this black hole to make a video

Damn Disney derails!



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