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The easiest way to imagine a black hole is to imagine some food and then to imagine @hippy hovering nearby.
There you go, doesn't take any imagination.
Oliver Schick
for some reason i'd never visualised a blackhole as a sphere before, had always thought of them as 2D flat circle .... are they spheres ?
now even more confused
time to watch tonights bbc programme on them and the photo, to see whats what