The outer white area is the core or centre of the galaxy NGC4261.
Inside the core there is a brown spiral-shaped disk. It weighs on hundred thousand times as much as our sun.
Because it is rotating we can measure the radii and speed of its constituents, and hence weigh the object at its centre. This object is about as large as our solar system, but weighs 1,200,000,000 times as much as our sun.
This means that gravity is about one million times as strong as
on the sun. Almost certainly this object is a black hole.
Although the object is no bigger than our solar system it weighs three billion times as much as the sun. This means that gravity is so strong that light cannot escape. We have a black hole.
In the first figure, there is a diagonal line. This is believed to be the passage out of those fortunate particles which escape along the axis of rotation and avoid being swallowed by the black hole.
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