What evidence supports the existence of a black hole at the center of our galaxy?
A)The motions of the gas and stars at the center indicate that it contains 4 million solar masses within a region only 3 light- years across.
B)We can see gas falling into an accretion disk and past the event horizon of a black hole.
C)We observe a large, dark object that absorbs all light at the center of our galaxy.
D)We observe an extremely bright X- ray source at the center of our galaxy.
E)All of the above

Question

Quizplus · Accepted Answer

The evidence supporting the existence of a black hole at the center of our galaxy includes the observation of the motions of gas and stars, which suggest a very massive object within a small region, indicative of a black hole's gravitational influence. Choices B, C, and D are not accurate descriptions of the observable evidence related to the black hole at the center of our galaxy.

What Evidence Supports the Existence of a Black Hole at the Center