What kind of object do we think lies in the center of the Milky Way Galaxy?
A) A 3 to 4 million solar mass black hole
B) A gigantic X-ray binary system
C) A dense cluster of young, hot stars
D) An enormous collection of dark matter, explaining why we detect no light at all from the galactic center

Question

Quizplus · Accepted Answer

Observations of the orbits of stars close to the center of the Milky Way have strongly suggested the presence of a supermassive object with a mass of about 3 to 4 million times the mass of the sun. The most likely explanation is a black hole, as no other known object can explain the extreme gravitational forces required.

What Kind of Object Do We Think Lies in the Center