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RECENT POSTS IN THIS TOPIC

James Putnam: on 5/18/19 at 22:13pm UTC, wrote Light bends because it is accelerating. It accelerates toward an object...

James Putnam: on 5/4/19 at 2:49am UTC, wrote It is a picture of a very massive object; however, there is no way it could...

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FQXi BLOGS
September 16, 2021

CATEGORY: Blog [back]
TOPIC: Black Hole Photographed for the First Time: EHT Announcement [refresh]
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FQXi Administrator Zeeya Merali wrote on Apr. 9, 2019 @ 19:33 GMT
Updated:

Scientists have obtained the first image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. The image shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun. This long-sought image provides the strongest evidence to date for the existence of supermassive black holes and opens a new window onto the study of black holes, their event horizons, and gravity. Credit: Event Horizon Telescope Collaboration

Official press announcement.

On 10 April, astronomers revealed the first ever image of a black hole event horizon -- the surface beyond which light cannot escape from the hole's grasp -- taken by the Event Horizon Telescope (actually a network of telescopes around the world).

You can watch the English language press conference from Brussels live:



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Georgina Woodward wrote on Apr. 16, 2019 @ 03:43 GMT
Congratulations to all involved.

At the end of the official announcement "Event Horizon Telescope" are six papers explaining in detail what was done.

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Georgina Woodward replied on Apr. 17, 2019 @ 06:29 GMT
First M87 Event Horizon Telescope Results. III. Data Processing and Calibration. I understand very little of what is written there but now have an appreciation of what an 'astronomically' complicated feat has been accomplished.

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Georgina Woodward replied on Apr. 20, 2019 @ 04:41 GMT
'First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole': The introduction to this section talks about why M87 was a black hole 'candidate. "Since the discovery of the first astrophysical jet apparently connected to its nucleus (Curtis 1918), the giant elliptical galaxy M87 in the Virgo cluster has been intensively studied with imaging observations. M87's nuclear gas and stellar dynamics, as traced by optical and infrared (IR) spectroscopy, suggest the presence of a nuclear supermassive black hole .." The Event Horizon Telescope Collaboration, 2019 April 10

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James A Putnam wrote on May. 4, 2019 @ 02:49 GMT
It is a picture of a very massive object; however, there is no way it could be a picture of a Black Hole. In order for it to be a picture of a Black Hole, it must picturing time-dilation and space-contraction. No one has ever written a physics equation where time or space were directly represented. Both properties have always been substituted for. The units of meter and second tell us what it is...

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James A Putnam replied on May. 18, 2019 @ 22:13 GMT
Light bends because it is accelerating. It accelerates toward an object that has mass. The reason for why it bends toward an object with mass is not known by mainstream physics. The reason is because mainstream physics has not learned how to define the property of mass. An undefined property is an unexplained property. Mass has always been an undefined property. It remains undefined to this day....

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