What do astronomers believe exists in the center of nearly every galaxy?

Question

Quizplus · Accepted Answer

Astronomers believe that a supermassive black hole exists in the center of nearly every galaxy. This is based on observations of the motions of stars and gas clouds close to the galactic center, as well as the detection of intense radiation from these regions. Black holes are thought to be formed by the collapse of massive stars and can have masses equivalent to billions of suns.

What Do Astronomers Believe Exists in the Center of Nearly