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, which explains why we detect no light at all from the galactic center
Answer:A
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, which explains why we detect no light at all from the galactic center