The energy source at the center of our galaxy
A) is not visible at optical wavelengths.
B) produces gamma rays.
C) must be less than 10 AU in diameter.
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

The energy source at the center of our galaxy, believed to be a supermassive black hole, is not visible at optical wavelengths due to dust and gas obscuration, produces gamma rays as part of its energetic emissions, and must be less than 10 AU in diameter based on observations of the orbits of nearby stars.

The Energy Source at the Center of Our Galaxy