Which of the following observations confirms that Sgr A at the center of our galaxy is indeed a supermassive black hole?
A) Measurements of occasional X-ray emission from Sgr A
B) Measurements of trans-dimensional space warps in the vicinity of Sgr A
C) Measurements of radio emission from gas around Sgr A
D) Measurements of the orbits of stars around Sgr A

Question

Quizplus · Accepted Answer

Measurements of the orbits of stars around Sgr A provide the strongest evidence that it is a supermassive black hole. The stars orbiting Sgr A have been observed to be moving at extremely high speeds, indicating the presence of an incredibly massive object at the center that is exerting a strong gravitational pull.

Which of the Following Observations Confirms That Sgr a at the Center