Read the excerpt from "Black Hole Beginnings."

The star, a big, brilliant ball of light, has turned into a dark place of enormous gravitation. A black hole has formed.

Which image would best support a reader's understanding of the text?

A white sphere with speckles.
A cloud of gas that is brighter in the center and darker at the edges.
A dark colored sphere with a black center and a haze of gases surrounding it.
Lines of bright light extending from a bright center.