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A Black Day (and a Happy One) In Scientific History

10 Apr 2019, 14:16 UTC
A Black Day (and a Happy One) In Scientific History
(200 words excerpt, click title or image to see full post)

Twenty years ago, astronomers Heino Falcke, Fulvio Melia and Eric Agol (a former colleague of mine at the University of Washington) pointed out that the black hole at the center of our galaxy, the Milky Way, was probably big enough to be observed — not with a usual camera using visible light, but using radio waves and clever techniques known as “interferometry”. Soon it was pointed out that the black hole in M87, further but larger, could also be observed. [How? I explained this yesterday in this post.]
And today, an image of the latter, looking quite similar to what we expected, was presented to humanity. Just as with the discovery of the Higgs boson, and with LIGO’s first discovery of gravitational waves, nature, captured by the hard work of an international group of many scientists, gives us something definitive, uncontroversial, and spectacularly in line with expectations.
An image of the dead center of the huge galaxy M87, showing a glowing ring of radio waves from a disk of rapidly rotating gas, and the dark quasi-silhouette of a solar-system-sized black hole. Congratulations to the Event Horizon Telescope team
I’ll have more to say about this later [have to ...

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