Thanks for coming by, @lemouth. Secondly, I do appreciate this germane contribution of yours:

Just to add a few things about black hole detection. This consists in one of the greatest breakthroughs in physics of the last few years (in my opinion). Black holes have been detected recently in two different ways: from the detection of gravitational waves and by the EHT telescope. They both confirm their existence.

And finally, as regards the images, I've fixed them.

Thanks.