What Evidence Now Exists for a Supermassive Black Hole at the Center

question 52

Multiple Choice

What evidence now exists for a supermassive black hole at the center of our Galaxy?

• A) A very dark void in an otherwise bright region of space near the galactic center,indicating the presence of a black hole
• B) Observations of intense inflow of matter toward the center of the Galaxy,as seen by light-Doppler-shifted toward the red-emitted by this matter
• C) An absence of gas clouds surrounding the region of space near the galactic center
• D) Very rapid motion of matter close to the nucleus of the Galaxy,requiring a very massive body to hold it in orbit