First ever "black hole" image!

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First ever "black hole" image!

Unread post by Fransw » Thu Apr 11, 2019 2:09 pm

Scary stuff! :shock:
https://www.google.com/amp/s/www.bbc.co ... t-47873592
_106398636_mediaitem106398635.jpg
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Re: First ever "black hole" image!

Unread post by Iceberg » Thu Apr 11, 2019 2:18 pm

Fransw wrote:
Thu Apr 11, 2019 2:09 pm
Scary stuff! :shock:
https://www.google.com/amp/s/www.bbc.co ... t-47873592

_106398636_mediaitem106398635.jpg
Don't stress, it's 55 million light years away. :lol:
So even if you could travel at the speed of light, it will take you 55 million years to get there.
On the other hand, we see it as it was 55 million years ago. It might have gobbled up half the universe in the meantime... :shock: :twisted:
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Re: First ever "black hole" image!

Unread post by heisan » Thu Apr 11, 2019 2:20 pm

A sense of scale:

Image

(https://xkcd.com/2135/)
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Re: First ever "black hole" image!

Unread post by Tomcat1 » Thu Apr 11, 2019 2:30 pm

Since NOTHING can escape a Black Hole, I wander if there would be a possibility of sending a few certain individuals from parliament there :-k :twisted:
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Re: First ever "black hole" image!

Unread post by Fransw » Thu Apr 11, 2019 2:37 pm

(Copy paste from the article...)
The information they gathered was too much to be sent across the internet. Instead, the data was stored on hundreds of hard drives that were flown to a central processing centres in Boston, US, and Bonn, Germany, to assemble the information.

And its 6.5 billion times the mass of the sun!

Really scary stuff!! :shock:
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Re: First ever "black hole" image!

Unread post by bosvark » Thu Apr 11, 2019 4:55 pm

Iceberg wrote:
Thu Apr 11, 2019 2:18 pm
Fransw wrote:
Thu Apr 11, 2019 2:09 pm
Scary stuff! :shock:
https://www.google.com/amp/s/www.bbc.co ... t-47873592

_106398636_mediaitem106398635.jpg
Don't stress, it's 55 million light years away. :lol:
So even if you could travel at the speed of light, it will take you 55 million years to get there.
On the other hand, we see it as it was 55 million years ago. It might have gobbled up half the universe in the meantime... :shock: :twisted:
So how big is it by this time. Suddenly 55 million light years seem a bit close for comfort :shock: :shock: :wink:
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Re: First ever "black hole" image!

Unread post by heisan » Thu Apr 11, 2019 5:04 pm

bosvark wrote:
Thu Apr 11, 2019 4:55 pm
So how big is it by this time. Suddenly 55 million light years seem a bit close for comfort :shock: :shock: :wink:
Don't worry - there are many black holes much closer than that. One of the local ones will eat Earth long before we have to worry about that one. :twisted:
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Re: First ever "black hole" image!

Unread post by vanjast » Thu Apr 11, 2019 5:31 pm

Is it really a black hole ? --- It's a blurry image with a dark centre (could be a chocolate advert).
There's also supposed to be one at the centre of our galaxy (and virtually every spiral galaxy), we might be looking the wrong way ;)

You'd expect to see gravitation lensing indicators... 360 degree streaky red shift, 180 degree background image duplication across a 360 degree spectrum.

I would like a Hubble composite picture to compliment this one before I get excited. ;)
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Re: First ever "black hole" image!

Unread post by heisan » Thu Apr 11, 2019 5:46 pm

vanjast wrote:
Thu Apr 11, 2019 5:31 pm
I would like a Hubble composite picture to compliment this one before I get excited. ;)
Here you go:
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Re: First ever "black hole" image!

Unread post by Mfezi » Thu Apr 11, 2019 6:36 pm

Here is a documentary that explains a lot more about it, including why it was this particular black hole that they decided to look at and the various challenges they had to solve:
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Re: First ever "black hole" image!

Unread post by SlowApproach » Thu Apr 11, 2019 9:24 pm

You guys got it all wrong. That's a just picture of a doughnut taken by the photog Splat hired for his photoshoot :lol:
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Re: First ever "black hole" image!

Unread post by vanjast » Sat Apr 13, 2019 12:20 am

heisan wrote:
Thu Apr 11, 2019 5:46 pm
Here you go:
From what I understand Hubble doesn't have the resolution at that range, even over it's earth and sun orbit.
Trying to 'filter' at that range produces a fuzzy image. Not convincing enough for me.
Claim a possible, but not a definite... That is jumping the gun, even after Hawking has changed his mind ;)

Think of it this way..
In court would all the circumstantial evidence be supported by a fuzzy image of the alleged perp.. :)
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Re: First ever "black hole" image!

Unread post by heisan » Sat Apr 13, 2019 9:36 am

vanjast wrote:
Sat Apr 13, 2019 12:20 am
heisan wrote:
Thu Apr 11, 2019 5:46 pm
Here you go:
From what I understand Hubble doesn't have the resolution at that range, even over it's earth and sun orbit.
Trying to 'filter' at that range produces a fuzzy image. Not convincing enough for me.
Claim a possible, but not a definite... That is jumping the gun, even after Hawking has changed his mind ;)

Think of it this way..
In court would all the circumstantial evidence be supported by a fuzzy image of the alleged perp.. :)
Well, you asked for the hubble composite image, so I gave it to you. If you need an effective 10,000km diameter radio telescope to resolve this image, you can't expect much from a 2.4m optical telescope at the same range.

Imaging our own central black hole is also not easy. It is closer, but much smaller, so the effective resolution is the same. But we would be looking at it side-on through the accretion disk, which would limit direct observation.

Anyway, this is a nice party trick, but it is just one more corroborating observation. Gravity wave observations, gravity lensing observations, X-ray observations - everything tried so far agrees with the theory and existence of black holes. A fuzzy picture is good enough evidence, when the culprits fingerprints are all over the scene.
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Re: First ever "black hole" image!

Unread post by C Africa » Sat Apr 13, 2019 12:08 pm

I often get confused by scientists.

One: A black hole should NOT be black because according to the scientists, everything that was ever swallowed by that black hole should remain visible at the event horizon for ever (so you should see a jumble of all these items, not a black hole).

Two: Some-one above mentioned that even if you could travel at the speed of ight, it would take you 55 million years to get there, but that is only true for the people who remain behind om earth when you leave. For your self, time will slow down the faster you go, and if you can actually get to the speed of light time will stop, so for you, you will cover the distance in an instant.

C
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Re: First ever "black hole" image!

Unread post by Iceberg » Sat Apr 13, 2019 1:18 pm

C Africa wrote:
Sat Apr 13, 2019 12:08 pm
I often get confused by scientists.

One: A black hole should NOT be black because according to the scientists, everything that was ever swallowed by that black hole should remain visible at the event horizon for ever (so you should see a jumble of all these items, not a black hole).

Two: Some-one above mentioned that even if you could travel at the speed of ight, it would take you 55 million years to get there, but that is only true for the people who remain behind om earth when you leave. For your self, time will slow down the faster you go, and if you can actually get to the speed of light time will stop, so for you, you will cover the distance in an instant.

C
I am glad to see someone that understands the theory of relativity - a little :wink: . But it's all about the 'relative' bit that can be confusing. As we are on the earth right now, we could be moving away or toward another object in the universe at close to the speed of light. So our relative passing of time will slow down with regards to those objects, but relative to one another here on earth, time is not our friend...
So it can become vey confusing to get your head around it... :lol:

Gravity also has an influence. One national geographic program showed two synchronized atomic clocks. One was kept in the lab at low altitude and the other was taken to a high elevation location. When they brought it back a while later it had slowed down a few millionth of a second, relative to the other one. All because the force of gravity at the high elevation is slightly lower (further away from the centre of mass of the earth). All as predicted by Einstein. Fascinating stuff.
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