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 the orbits of stars around Sgr A
C)measurements of trans- dimensional space warps in the vicinity of Sgr A
D)measurements of radio emission from gas around Sgr A

Question

Quizplus · Accepted Answer

Measurements of the orbits of stars around Sgr A confirm that there is a massive object at the center of our galaxy. These measurements are consistent with the predictions of a supermassive black hole, providing strong evidence for its existence. X-ray emission, radio emission, and space warps are also observed in the vicinity of Sgr A, but they are not definitive evidence for a black hole.

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