Thursday, 25 April, 2019

First ever picture of a black hole

A radio telescope at the National Research Council's Dominion Astrophyscial Observatory in Penticton BC A radio telescope at the National Research Council's Dominion Astrophyscial Observatory in Penticton BC
Cary Marshall | 17 April, 2019, 14:58

This is known as the black hole's shadow or silhouette.

An worldwide scientific team on Wednesday announced a milestone in astrophysics - the first-ever photo of a black hole - using a global network of telescopes to gain insight into celestial objects with gravitational fields so strong no matter or light can escape. Powehi means "the adorned fathomless dark creation" or "embellished dark source of unending creation" and comes from the Kumulipo, an 18th century Hawaiian creation chant.

The proven fact that black holes don't permit lightweight to flee makes viewing them tough.

Researchers at the Event Horizon Telescope project said they were able to create the image of a black hole by using a network of eight radio telescopes, arrayed around the world from Antarctica to Arizona.

"We knew for some time that the Event Horizon Telescope would show the first-ever picture of a black hole, but the image was better than I expected".

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Meyers, who is not associated with EHT, said the most important takeaway from the image is that it allows scientists to test their understanding of how gravity works.

Black holes, predicted by physicist Karl Schwarzschild's solution to Albert Einstein's equations for gravity, are regions of space that are so dense that not even light can escape their gravity.

Einstein's baby, general relativity (E=MC squared was his mistress), predicts that any object collapsing beyond a certain point would form a black hole, inside which a singularity would appear.

Doeleman says that the black hole in M87 can be photographed in time-lapse style, due to the slow speed at which it changes. From this comparison image, we can see that the stimulated focus image looses resolution and provides a more vibrate increase of color.

"Imaging a black hole is just the beginning of our effort to develop new tools that will enable us to interpret the massively complex data that nature gives us", Psaltis added. But some black holes, especially supermassive ones dwelling in the galaxies center, stand out by voraciously accreting bright disks of gas and other material.

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