From Leah Crane in NewScientist (22 December 2018) concerning the new Event Horizon Telescope’s (a composite entity, actually) attempts to actually image a black hole:
The EHT collaboration’s images will look not like a sphere of darkness, but rather a banana of light. As the black hole rotates, it actually drags light along with it. This causes a bright crescent to appear on the side rotating towards us, juxtaposed with a dark shadow from the event horizon – the edge of the black hole itself.
Dragging light. That’s just a fascinating thought for this ignorant old software engineer. I would have expected the hold hole to bend light around it.
