Scientists set to reveal first true image of black hole

Artist's impression of a black hole surrounded by matter waiting to fall in
Artist's impression of a black hole surrounded by matter waiting to fall in

The world is finally about to see a black hole—not an artist's impression or a computer-generated likeness, but the real thing.

At six press conferences across the globe scheduled for 1300 GMT (0900 ET) on Wednesday, scientists will unveil the first results from the Event Horizon Telescope (EHT), conceived precisely for that purpose.

UPDATE: Astronomers deliver first photo of black hole

It has been a long wait.

Of all the forces in the Universe that we cannot see—including and dark matter—none has frustrated human curiosity as thoroughly as the invisible, star-devouring monsters known as black holes.

Yet, the phenomena are so powerful that nothing nearby—not even light—can escape their .

"Over the years, we accumulated indirect observational evidence," said Paul McNamara, an astrophysicist at the European Space Agency and project scientist for the LISA mission that will track massive black hole mergers from space.

In September 2015, for example, the LIGO in the United States measured two black holes smashing together.

"X-rays, radio-waves, light -– they all point to very compact objects, and the gravitational waves confirmed that they really are black holes, even if we have never actually seen one," McNamara told AFP.

Two candidates are vying to be in the first-ever image.

Oddsmakers favour Sagittarius A*, the black hole at the centre of our own spiral galaxy, the Milky Way.

World map showing the network of telescopes which formed an earth-sized virtual telescope to capture the first image of a black
World map showing the network of telescopes which formed an earth-sized virtual telescope to capture the first image of a black hole in outer space

Sag A* has four million times the mass of our Sun, and measures about 24 million kilometres across.

That may sound like a big target, but for the on Earth some 26,000 (245 trillion kilometres) away, it's like trying to photograph a golf ball on the Moon.

The other candidate is 1,500 times more massive still, ensconced in a faraway elliptical galaxy known as M87.

Comparing the two, distance and size balance out, making it roughly as easy (or hard) to pinpoint either.

Ripples in time-space

A black hole is a celestial object that compresses a huge mass into an extremely small space. The more mass, the larger the black hole.

At the same scale of compression, Earth's mass would fit inside a thimble, while the Sun's would be a mere six kilometres from edge to edge.

There are two types.

Garden-variety black holes—up to 20 times more massive than the Sun—form when the centre of a very big star collapses in on itself.

So-called supermassive black holes are at least a million times bigger than the Sun. Both Sag A* and M87 fall into this category.

At its center, the mass of a black hole is compressed into a single, zero-dimensional point. The distance between this so-called
At its center, the mass of a black hole is compressed into a single, zero-dimensional point. The distance between this so-called "singularity" and the event horizon is the radius, or half the width, of the black hole

The EHT is unlike any star-gazing instrument ever devised.

"Instead of constructing a giant telescope we combined several observatories as if they were fragments of a giant mirror," Michael Bremer, an astronomer at the Institute for Millimetric Radio Astronomy in Grenoble, told AFP.

Eight such radio telescopes scattered across the globe—in Hawaii, Arizona, Spain, Mexico, Chile, and the South Pole—zeroed in Sag A* and M87 on four different days in April 2017.

Each is at least a big as a football pitch. Together, they form a virtual telescope more than 12,000 kilometres across, the diameter of Earth.

Data collected by the far-flung array was to be collated by supercomputers at MIT in Boston and in Bonn, Germany.

"The imaging algorithms we developed fill the gaps of data we are missing in order to reconstruct a picture," the team said on their website.

Astrophysicists not involved in the project, including McNamara, are eagerly—perhaps anxiously—waiting to see if the findings challenge Einstein's theory of general relativity, which has never been tested on this scale.

The LIGO experiments from 2015 detected signature ripples in the curvatures of time-space during the black hole merger.

"Einstein's theory of general relativity says that this is exactly what should happen," McNamara said.

But those were tiny compared with either of the ones under the gaze of the EHT.

"Maybe the ones that are millions of times more massive are different—we just don't know yet," McNamara said.


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Scientists set to unveil first picture of a black hole

© 2019 AFP

Citation: Scientists set to reveal first true image of black hole (2019, April 10) retrieved 22 April 2019 from https://phys.org/news/2019-04-scientists-reveal-true-image-black.html
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Apr 10, 2019
Alice in Wonderland

Curious and curiouser alice said
now I'm opening out like the largest telescope that ever was!
Good-bye, feet!
for when she looked down at her feet
they seemed to be almost out of sight
they were getting so far off

For today
We are to see if Alice in Wonderland
is not the reality
That were presented

Apr 10, 2019
OK, there will be some semi good image which will probably look like the ring from the ring horror movie
https://resources...4413.jpg

So what? It will certainly not undermine General relativity theory, and even when there would be some conflict with the theory, mainstream pseudoscientists will certainly invent some totally out of reality explanation or invent some new sort of invisible matter or energy to save it.

Apr 10, 2019
Those magical four days in 2017

Algorithms in the Mists of Shadows
eight radio telescopes scattered across the globe
in Hawaii, Arizona, Spain, Mexico, Chile the South Pole
zeroed in on Sagittarius A* and M87 over four days in April 2017
for together
they formed a virtual telescope
12,000 kilometres across, the diameter of Earth
because
these imaging algorithms developed
to fill in the gaps of data missing to reconstruct a Picci
As long as these imaging algorithms
Do no portray Blackhole as a singularity
Do no portray Blackhole as a infinite gravity
Do no portray Blackhole as a infinite mass
Do no portray Blackhole with an infinite escape velocity towards its centre of mass
Do no fill in the gaps of missing data in order to reconstruct a picture of Blackhole
If all these things are not portrayed
Blackhole will recapture some semblance of reality and air of respectability
For today, we enter Alice in Wonderland

Apr 10, 2019
I'm guessing it will just be another picture of pretty-colored clouds.

Apr 10, 2019
So what? It will certainly not undermine General relativity theory, and even when there would be some conflict with the theory, mainstream pseudoscientists will certainly invent some totally out of reality explanation or invent some new sort of invisible matter or energy to save it.


No, they won't. And the thing they are most interested in is if there is indeed any departure from GR. Because if there is, it may give a clue where to look for the tweaks required to GR. And they are not pseudoscientists. That refers to cretins such as the electric universe clowns, who dress mythology-based garbage up to make it look scientific to the hard of thinking. These are real scientists, with real degrees, doing real science. Learn the difference.

Apr 10, 2019
What an exciting day! Can't wait for the press conference.
It's days like these I live for. I wish there were more like it.

Apr 10, 2019
What an exciting day! Can't wait for the press conference.
It's days like these I live for. I wish there were more like it.


Isn't it just ! Been jittery since I got up !
One more hour to go ! Woohoo :)

Apr 10, 2019
Don't miss it. it is live in less than an hour.
https://www.youtu...Yuy8dwuk

Apr 10, 2019
Don't miss it. it is live in less than an hour.
https://www.youtu...Yuy8dwuk


Same feed, but on ESO's page;

https://www.eso.o...ic/live/

Apr 10, 2019
The world is finally about to see a black hole—not an artist's impression or a computer-generated likeness, but the real thing.

With all the contrived algorithmic maths gymnastics it is still just a artist's impression, no two bones about it.

Apr 10, 2019
The world is finally about to see a black hole—not an artist's impression or a computer-generated likeness, but the real thing.

With all the contrived algorithmic maths gymnastics it is still just a artist's impression, no two bones about it.


Liar. Stop making things up.

Apr 10, 2019
Don't miss it. it is live in less than an hour.
https://www.youtu...Yuy8dwuk

Rah, rah, rah, sis boom bah
Black hole, black hole...

Apr 10, 2019
Don't miss it. it is live in less than an hour.
https://www.youtu...Yuy8dwuk

Rah, rah, rah, sis boom bah
Black hole, black hole...


Lol. All the dumb cranks are shaking like a sh*tting dog!

Apr 10, 2019
Don't miss it. it is live in less than an hour.
https://www.youtu...Yuy8dwuk

Rah, rah, rah, sis boom bah
Black hole, black hole...


Lol. All the dumb cranks are shaking like a sh*tting dog!


Do you think their world will be crumbling ? Doubt it...
As if they would change their tune even if they were being spaghettified hahaha

The denial is deep !


Apr 10, 2019
Started off promisingly. The headline at the back, on the screen says: "Unveiling of the first ever image of a Black Hole."

Apr 10, 2019
This is going to be the most sobering
the most tongue in cheek conference
in the history of conferences
when all is said and done
when all the missing data is removed
all the obfuscation is sidelined
all the hype that's overly hyped is returned to the quantum fluctuations
we will attend a conference
as all Blackholes conference's descend
into the dusts of oblivion
when Blackholes identity is compromised
in this vacuum of space
Dust, glorious dust always comes to Blackholes rescues!

Apr 10, 2019
^^^Sod off, you clueless idiot.

Apr 10, 2019
Whoa, it's M87!

Apr 10, 2019
"Something we can test, and we can measure and observe repeatedly !"

Oh yeah !!!

Apr 10, 2019
Was it not your good self, dear old jonesy
^^^Sod off, you clueless idiot.

Jonesy
try as we might
it has been impossible
to shake of this eternal spectre of dust
that your good self, jonesy
hath conjured up to veil Blackhole in this secrecy of Dust
we have tried to unveil Blackhole, but to no avail
so, as they say
if you can not beat them, join them
so dear jonesy
we celebrate dear old Blackhole in his veil of dust
because
dear jonesy
this secret veil of dust
is a
God send, sent down from above to hide Blackholes secrets!

Apr 10, 2019
How pathetic must a man be ?
To reject the existence of the wall that his head is smashed in !

Tell me @granville583762

Apr 10, 2019
Was it not your good self, dear old jonesy
^^^Sod off, you clueless idiot.

Jonesy
try as we might
it has been impossible
to shake of this eternal spectre of dust
that your good self, jonesy
hath conjured up to veil Blackhole in this secrecy of Dust
we have tried to unveil Blackhole, but to no avail
so, as they say
if you can not beat them, join them
so dear jonesy
we celebrate dear old Blackhole in his veil of dust
because
dear jonesy
this secret veil of dust
is a
God send, sent down from above to hide Blackholes secrets!


Go away you uneducated clown.

Apr 10, 2019
In search of black holes and dark matter astrophysicists are relying on indirect observations. It would seem that the measurement of the event horizon of a black hole directly would be a direct evidence. However, by the nature of a horizon, any real measurement of the event horizon will be indirect. The Event Horizon Telescope will get picture of the silhouette of the Sgr A* which is due to optical effects of spacetime outside of the event horizon. The result will be determined by the simple quality of the resulting image that does not depend on the properties of the spacetime within the image. So, it will be also indirect and an existence of BH is a hypothesis.
https://www.acade...ilky_Way
https://www.acade...and_Jets

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