"The view from near, and inside, a black hole
Below are views at various distances from a black hole. These are wide-angle shots, each about 127° across (the same apparent width as a 4-metre object just 1 metre away). Distances are given in the “Schwarzschild r” coordinate — the circumference of a circle centred on the hole, divided by 2 π — and in units of “M”, which is a scale determined by the mass of the hole. For Chandrasekhar, a twelve solar-mass hole, M = 17.6 km. The event horizon lies at r = 2 M."
5 out of 5
http://www.gregegan.net/PLANCK/Tour/Tour.html
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