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User Name Thread Name Subject Posted
David Carter (UK) BS: Black holes (47) RE: BS: Black holes 10 Apr 19

There is supposed to be a press release today from the Event Horizon Telescope. I know nothing about this apart from what I can read online, and much of that is so dumbed down it doesn't make sense. But the EHT appears to be a network of high frequency radio telescopes, operating as a very long baseline interferometer. So you combine the signals from the telescopes to effectively construct a large telescope with a diameter set by the separations between the individual telescopes.

What they seem to have wanted to do is image the black hole shadow of the black hole in the centre of our galaxy. The black hole shadow isn't the same as the event horizon, it is an absence of radiation from the hot material surrounding the black hole caused by the fact that the black hole absorbs part of that light.

New Scientist article on this project

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