Monday, 11 November, 2019

The First Image of a Black Hole Is Here

The shadow of a black hole seen here is the closest we can come to an image of the black hole itself a completely dark object from which light cannot escape Here is the first photo of a black hole
Sandra Phillips | 18 April, 2019, 19:40

What's new here is that the Event Horizons Telescope imaged the shadow that the black hole creates against the surrounding, glowing matter of the object's accretion disk (the hot matter falling quickly toward the black hole's event horizon). They form when a massive star collapses at the end of its life. No matter has a chance to ever escape the black hole and return to the universe.

The reasearch team took the images by linking up giant radio dishes from across the world, which has created a virtual telescope that is about the size of Earth, which was needed to create the enormous magnifying power to collect enough electromagnetic and radio waves to produce an image of an area around a distant black hole.

But the incredible photo, which was released by Event Horizon Telescope on Wednesday, has also excited fans of food, Lord of the Rings, and Christopher Nolan alike. He announced the image discovery.

"At the moment we have plenty of proof that black holes may be found in the centre of every single galaxy".

Others thought the black hole looked extremely similar to the image used for "Superunknown", a 1994 album by Soundgarden which just happens to include a song called "Black Hole Sun". Scientists had to synchronize eight radio telescopes on four continents. The two targeted black holes - in the centre of the Milky Way and in M87 - are roughly the same apparent size when seen from Earth, because although the M87 black hole is much larger it's also much farther away.

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The galaxy is called Messier 87, or M87. Dubbed Pōwehi (pronounced poe-vay-hee), a word from Hawaiian mythology meaning "embellished dark source of unending creation", the object is 6.5 billion times as massive as the sun and has a diameter of 24 billion miles. In the above image, what we are witnessing is the event horizon (through an global network of radio telescopes called Event Horizon Telescope) as the light crosses over the threshold.

The image captured is the result of years of worldwide collaboration, which offers scientists a new way to study the most extreme objects in the Universe predicted by Einstein's theory of general relativity during the centennial year of the historic experiment that first confirmed the theory, according to Academia Sinica.

But seeing is believing, noted Dan Marrone, an astrophysicist at the University of Arizona who sits on the EHT's science council. Confirming the predictions of general relativity, and seeing the event horizon, is magical. Previously, scientists have only been able to visualise black holes in simulations. It is always exciting to discover a completely new and unexpected effect that keeps the theoreticians up at night, but it is also very satisfying when what you expected turns out to be precisely true.

The mission is a "high-risk but high-payoff endeavor", Doeleman said. He's a black hole, ' she wrote. He added that he felt very satisfied that the image did not contain any big surprises. "Einstein's theory of gravity predicts that we should see a ring of light, but to have it come through so clearly rocked us back on our heels". We saw something so true. I wanted to know is this real!' Katie Bouman, a PhD student at MIT, created the algorithm that was able to put the data from the EHT together. Despite decades of indirect evidence supporting their existence, black holes have never been captured by camera - until now.

"We are now studying how to move the telescope to the Greenland Summit, and how to construct the telescope site at the Summit", explained Chen Ming-tang (陳明堂), an Academia research fellow and one of the leading scientists in EHT.

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